https://ceos-org.github.io/eo-glossary/ Community thesaurus of terms and definitions for Earth Observation sciences, maintained by CEOS and the EC Knowledge Centre for Earth Observation (KCEO). en Wed, 01 Apr 2026 14:54:25 GMT https://ceos-org.github.io/eo-glossary/assets/og-banner.svg https://ceos-org.github.io/eo-glossary/ CEOS & EC KCEO https://ceos-org.github.io/eo-glossary/terms/workflow https://ceos-org.github.io/eo-glossary/terms/workflow Wed, 01 Apr 2026 14:53:29 GMT Orchestrated and repeatable pattern of business activity enabled by systematic organization of resources into processes. https://ceos-org.github.io/eo-glossary/terms/unstructured_data https://ceos-org.github.io/eo-glossary/terms/unstructured_data Wed, 01 Apr 2026 14:53:29 GMT Information in diverse forms that does not conform to conventional data models, complicating storage and management in relational databases. https://ceos-org.github.io/eo-glossary/terms/update_frequency https://ceos-org.github.io/eo-glossary/terms/update_frequency Wed, 01 Apr 2026 14:53:29 GMT Frequency at which the product is available to users. https://ceos-org.github.io/eo-glossary/terms/user https://ceos-org.github.io/eo-glossary/terms/user Wed, 01 Apr 2026 14:53:29 GMT Entity (person, organization, institution, etc.) requesting data or information with specified characteristics. https://ceos-org.github.io/eo-glossary/terms/user_category https://ceos-org.github.io/eo-glossary/terms/user_category Wed, 01 Apr 2026 14:53:29 GMT Classification of users in order to provide PDGS services with different access rights and service levels. https://ceos-org.github.io/eo-glossary/terms/user_engagement https://ceos-org.github.io/eo-glossary/terms/user_engagement Wed, 01 Apr 2026 14:53:29 GMT Evidence-based practice of understanding user needs, challenges, and work environments to deliver useful, usable, and used products and services through ongoing mutual exchange. https://ceos-org.github.io/eo-glossary/terms/user_guide https://ceos-org.github.io/eo-glossary/terms/user_guide Wed, 01 Apr 2026 14:53:29 GMT Documentation intended to assist users in using a particular product, service, or application. https://ceos-org.github.io/eo-glossary/terms/user_interface https://ceos-org.github.io/eo-glossary/terms/user_interface Wed, 01 Apr 2026 14:53:29 GMT Set of all the components of an interactive system that provide information and controls for the User to accomplish specific tasks with the interactive system. https://ceos-org.github.io/eo-glossary/terms/user_management https://ceos-org.github.io/eo-glossary/terms/user_management Wed, 01 Apr 2026 14:53:29 GMT The user management function maintains information about registered users and supports registration, authentication and information needed for authorization. https://ceos-org.github.io/eo-glossary/terms/user_support https://ceos-org.github.io/eo-glossary/terms/user_support Wed, 01 Apr 2026 14:53:29 GMT User support is a function inside the payload data ground segment to support external users to interact with the segment, to handle user registration, inquiries, complaints. https://ceos-org.github.io/eo-glossary/terms/validation https://ceos-org.github.io/eo-glossary/terms/validation Wed, 01 Apr 2026 14:53:29 GMT Process of assessing, by independent means, the quality of the data products derived from the system outputs. https://ceos-org.github.io/eo-glossary/terms/value https://ceos-org.github.io/eo-glossary/terms/value Wed, 01 Apr 2026 14:53:29 GMT Element of a type domain. https://ceos-org.github.io/eo-glossary/terms/value_added_product https://ceos-org.github.io/eo-glossary/terms/value_added_product Wed, 01 Apr 2026 14:53:29 GMT The production of a product in a manner that changes the physical state or form of the product and enhances its value, as demonstrated through a business plan. https://ceos-org.github.io/eo-glossary/terms/variable https://ceos-org.github.io/eo-glossary/terms/variable Wed, 01 Apr 2026 14:53:29 GMT Physical property whose value determines the characteristics or behavior of a system, such as temperature, pressure, or density. https://ceos-org.github.io/eo-glossary/terms/verification https://ceos-org.github.io/eo-glossary/terms/verification Wed, 01 Apr 2026 14:53:29 GMT Provision of objective evidence that a given item fulfils specified requirements. https://ceos-org.github.io/eo-glossary/terms/version https://ceos-org.github.io/eo-glossary/terms/version Wed, 01 Apr 2026 14:53:29 GMT Versioning refers to saving new copies of your files when you make changes so that you can go back and retrieve specific versions of your files later. https://ceos-org.github.io/eo-glossary/terms/version_control https://ceos-org.github.io/eo-glossary/terms/version_control Wed, 01 Apr 2026 14:53:29 GMT Method of working with collections, similar to the version control systems used in traditional software development but optimized to allow better processing of data and collaboration in the context... https://ceos-org.github.io/eo-glossary/terms/vertical_levels https://ceos-org.github.io/eo-glossary/terms/vertical_levels Wed, 01 Apr 2026 14:53:29 GMT Levels of a vertical discretization. https://ceos-org.github.io/eo-glossary/terms/vicarious_calibration https://ceos-org.github.io/eo-glossary/terms/vicarious_calibration Wed, 01 Apr 2026 14:53:29 GMT Post-launch calibration of sensors that make use of natural or artificial sites on the surface of the Earth. https://ceos-org.github.io/eo-glossary/terms/virtual_archive_information_package https://ceos-org.github.io/eo-glossary/terms/virtual_archive_information_package Wed, 01 Apr 2026 14:53:29 GMT A ‘Virtual’ AIP (vAIP) is an NCEI specific realization of the Open Archival Information System Reference Model (OAIS RM) concept of the Archival Information Package (AIP). https://ceos-org.github.io/eo-glossary/terms/visualization https://ceos-org.github.io/eo-glossary/terms/visualization Wed, 01 Apr 2026 14:53:29 GMT Display of an image representing a segment or subset of a data granule. https://ceos-org.github.io/eo-glossary/terms/volume https://ceos-org.github.io/eo-glossary/terms/volume Wed, 01 Apr 2026 14:53:29 GMT A unit of physical storage medium which contains data. https://ceos-org.github.io/eo-glossary/terms/web_object_storage https://ceos-org.github.io/eo-glossary/terms/web_object_storage Wed, 01 Apr 2026 14:53:29 GMT Object Storage accessible through HTTPS. https://ceos-org.github.io/eo-glossary/terms/temporal_consistency https://ceos-org.github.io/eo-glossary/terms/temporal_consistency Wed, 01 Apr 2026 14:53:29 GMT Condition where the temporal statistical properties of the Sample depend only on the underlying physical processes and not on other factors such as fusing different products or sensors. https://ceos-org.github.io/eo-glossary/terms/temporal_extent https://ceos-org.github.io/eo-glossary/terms/temporal_extent Wed, 01 Apr 2026 14:53:29 GMT Period during which data was collected, observations were made, or for which the model was run. https://ceos-org.github.io/eo-glossary/terms/temporal_reporting_period https://ceos-org.github.io/eo-glossary/terms/temporal_reporting_period Wed, 01 Apr 2026 14:53:29 GMT Time Period used for reporting and for which the information should be aggregated from the native Temporal Resolution. https://ceos-org.github.io/eo-glossary/terms/temporal_resolution https://ceos-org.github.io/eo-glossary/terms/temporal_resolution Wed, 01 Apr 2026 14:53:29 GMT Regular interval between observations or model time steps that determines the smallest resolvable event or process. https://ceos-org.github.io/eo-glossary/terms/temporal_revisit https://ceos-org.github.io/eo-glossary/terms/temporal_revisit Wed, 01 Apr 2026 14:53:29 GMT Interval between successive observations. https://ceos-org.github.io/eo-glossary/terms/thematic_resolution https://ceos-org.github.io/eo-glossary/terms/thematic_resolution Wed, 01 Apr 2026 14:53:29 GMT Level of categorical detail of information expressed by the number of classes. https://ceos-org.github.io/eo-glossary/terms/thematic_uncertainty https://ceos-org.github.io/eo-glossary/terms/thematic_uncertainty Wed, 01 Apr 2026 14:53:29 GMT Uncertainty associated with the method of classification. https://ceos-org.github.io/eo-glossary/terms/thumbnail https://ceos-org.github.io/eo-glossary/terms/thumbnail Wed, 01 Apr 2026 14:53:29 GMT Small, very low resolution browse image which may be made available for users as part of the catalogue service . https://ceos-org.github.io/eo-glossary/terms/time_of_day https://ceos-org.github.io/eo-glossary/terms/time_of_day Wed, 01 Apr 2026 14:53:29 GMT Time of the day at which the variable or parameter is observed or simulated by a model. https://ceos-org.github.io/eo-glossary/terms/time_of_year https://ceos-org.github.io/eo-glossary/terms/time_of_year Wed, 01 Apr 2026 14:53:29 GMT Time of the year at which the variable is observed or simulated by a model. https://ceos-org.github.io/eo-glossary/terms/timeliness https://ceos-org.github.io/eo-glossary/terms/timeliness Wed, 01 Apr 2026 14:53:29 GMT Period between the moment of requesting information and the moment of availability of information. https://ceos-org.github.io/eo-glossary/terms/tolerance https://ceos-org.github.io/eo-glossary/terms/tolerance Wed, 01 Apr 2026 14:53:29 GMT ### Notes. https://ceos-org.github.io/eo-glossary/terms/traceability https://ceos-org.github.io/eo-glossary/terms/traceability Wed, 01 Apr 2026 14:53:29 GMT Property of a measurement result whereby the result can be related to a Reference through a documented unbroken chain of calibrations, each contributing to the measurement uncertainty. https://ceos-org.github.io/eo-glossary/terms/traceability_chain https://ceos-org.github.io/eo-glossary/terms/traceability_chain Wed, 01 Apr 2026 14:53:29 GMT Sequence of measurement standards and calibrations that is used to relate a measurement result to a reference. https://ceos-org.github.io/eo-glossary/terms/trait https://ceos-org.github.io/eo-glossary/terms/trait Wed, 01 Apr 2026 14:53:29 GMT Characteristic belonging to an entity and referenced by an identifier. https://ceos-org.github.io/eo-glossary/terms/transcription https://ceos-org.github.io/eo-glossary/terms/transcription Wed, 01 Apr 2026 14:53:29 GMT Migration of data from one storage medium to another (from old to new technologies) in order to preserve the data and for efficiency purposes. https://ceos-org.github.io/eo-glossary/terms/transformation https://ceos-org.github.io/eo-glossary/terms/transformation Wed, 01 Apr 2026 14:53:29 GMT A digital migration in which there is an alteration to the content information or preservation Description information of an archival information package. https://ceos-org.github.io/eo-glossary/terms/type_a_evaluation_of_uncertainty https://ceos-org.github.io/eo-glossary/terms/type_a_evaluation_of_uncertainty Wed, 01 Apr 2026 14:53:29 GMT Method of evaluation of a component of measurement uncertainty by a statistical analysis of quantity values obtained by measurements under repeatability conditions. https://ceos-org.github.io/eo-glossary/terms/type_b_evaluation_of_uncertainty https://ceos-org.github.io/eo-glossary/terms/type_b_evaluation_of_uncertainty Wed, 01 Apr 2026 14:53:29 GMT Method of evaluation of a component of measurement uncertainty by means other than a statistical analysis of quantity values obtained by measurement. https://ceos-org.github.io/eo-glossary/terms/uncertainty https://ceos-org.github.io/eo-glossary/terms/uncertainty Wed, 01 Apr 2026 14:53:29 GMT Parameter, associated with the result of a measurement, that characterises the dispersion of the values that could reasonably be attributed to the measurand. https://ceos-org.github.io/eo-glossary/terms/uncertainty_of_measurement_method https://ceos-org.github.io/eo-glossary/terms/uncertainty_of_measurement_method Wed, 01 Apr 2026 14:53:29 GMT Uncertainty associated with the method of measurement, as there can be other methods, some of them as yet unknown or in some way impractical, that would give systematically different results of app... https://ceos-org.github.io/eo-glossary/terms/uniform_resource_identifier https://ceos-org.github.io/eo-glossary/terms/uniform_resource_identifier Wed, 01 Apr 2026 14:53:29 GMT Compact sequence of characters identifying an abstract or physical resource on the Internet. https://ceos-org.github.io/eo-glossary/terms/uniform_resource_locator https://ceos-org.github.io/eo-glossary/terms/uniform_resource_locator Wed, 01 Apr 2026 14:53:29 GMT Reference to a web resource specifying its location and retrieval mechanism. https://ceos-org.github.io/eo-glossary/terms/stability https://ceos-org.github.io/eo-glossary/terms/stability Wed, 01 Apr 2026 14:53:29 GMT Maximum acceptable change in Uncertainty per decade. https://ceos-org.github.io/eo-glossary/terms/standard_product https://ceos-org.github.io/eo-glossary/terms/standard_product Wed, 01 Apr 2026 14:53:29 GMT Agency-certified key products systematically acquired and generated through extensive spatial and temporal processing. https://ceos-org.github.io/eo-glossary/terms/standard_uncertainty https://ceos-org.github.io/eo-glossary/terms/standard_uncertainty Wed, 01 Apr 2026 14:53:29 GMT Standard deviation of the probability distribution describing the spread of possible values in quantitative/continuous data. https://ceos-org.github.io/eo-glossary/terms/standardisation https://ceos-org.github.io/eo-glossary/terms/standardisation Wed, 01 Apr 2026 14:53:29 GMT Establish an agreement (not necessarily obligatory) on precise procedures and concepts. https://ceos-org.github.io/eo-glossary/terms/steward https://ceos-org.github.io/eo-glossary/terms/steward Wed, 01 Apr 2026 14:53:29 GMT Entity responsible for the safe custody, transport, storage of the data and implementation of business rules. https://ceos-org.github.io/eo-glossary/terms/stewardship https://ceos-org.github.io/eo-glossary/terms/stewardship Wed, 01 Apr 2026 14:53:29 GMT Responsibility for planning, management, and certification of digital Earth observation data sets throughout mission phases, including curation, preservation, governance, and resource allocation fo... https://ceos-org.github.io/eo-glossary/terms/storage https://ceos-org.github.io/eo-glossary/terms/storage Wed, 01 Apr 2026 14:53:29 GMT The permanent holding place for digital data, until purposely erased. https://ceos-org.github.io/eo-glossary/terms/structured_data https://ceos-org.github.io/eo-glossary/terms/structured_data Wed, 01 Apr 2026 14:53:29 GMT Data with explicit structural relations between elements encoded in its storage format, such as XML or JSON, enabling logical interpretation distinct from visual layout. https://ceos-org.github.io/eo-glossary/terms/structured_error https://ceos-org.github.io/eo-glossary/terms/structured_error Wed, 01 Apr 2026 14:53:29 GMT Errors in satellite imagery affecting multiple pixels non-uniformly, where errors are correlated across affected regions due to localized systematic or random effects. https://ceos-org.github.io/eo-glossary/terms/submission_agreement https://ceos-org.github.io/eo-glossary/terms/submission_agreement Wed, 01 Apr 2026 14:53:29 GMT The agreement reached between an OAIS and theproducer that specifies a data model for the datasubmission session. https://ceos-org.github.io/eo-glossary/terms/submission_information_package https://ceos-org.github.io/eo-glossary/terms/submission_information_package Wed, 01 Apr 2026 14:53:29 GMT An Information Package that is delivered by the Producer to the OAIS for use in the construction or update of one or more AIPs and/or the associated Descriptive Information. https://ceos-org.github.io/eo-glossary/terms/subscription https://ceos-org.github.io/eo-glossary/terms/subscription Wed, 01 Apr 2026 14:53:29 GMT Service providing regular access to a predefined set of products, typically delivered online, with user enrollment via subscription requests and no further ordering required. https://ceos-org.github.io/eo-glossary/terms/subscription_service https://ceos-org.github.io/eo-glossary/terms/subscription_service Wed, 01 Apr 2026 14:53:29 GMT Service that notifies subscribers of data updates. https://ceos-org.github.io/eo-glossary/terms/subsetting https://ceos-org.github.io/eo-glossary/terms/subsetting Wed, 01 Apr 2026 14:53:29 GMT Extraction of a multi-dimensional rectangular pixel array from a data granule, defined by starting location and count along each dimension, or delivery of subset data based on time, space, variable... https://ceos-org.github.io/eo-glossary/terms/swath https://ceos-org.github.io/eo-glossary/terms/swath Wed, 01 Apr 2026 14:53:29 GMT Area covered by spatial samples collected during a scan of a spaceborne instrument, determined by its incidence angle. https://ceos-org.github.io/eo-glossary/terms/system https://ceos-org.github.io/eo-glossary/terms/system Wed, 01 Apr 2026 14:53:29 GMT Set of interrelated or interacting elements. https://ceos-org.github.io/eo-glossary/terms/systematic_error https://ceos-org.github.io/eo-glossary/terms/systematic_error Wed, 01 Apr 2026 14:53:29 GMT Component of measurement error that remains constant or varies predictably across replicate measurements. https://ceos-org.github.io/eo-glossary/terms/tagging https://ceos-org.github.io/eo-glossary/terms/tagging Wed, 01 Apr 2026 14:53:29 GMT Process of adding tags or annotations to components of unstructured data at a granular level to prepare it for analysis, enabling deeper insight beyond broad categorization. https://ceos-org.github.io/eo-glossary/terms/technology_stewards https://ceos-org.github.io/eo-glossary/terms/technology_stewards Wed, 01 Apr 2026 14:53:29 GMT Individuals who are responsible for establishing, maintaining, and being accountable for the. https://ceos-org.github.io/eo-glossary/terms/telemetry https://ceos-org.github.io/eo-glossary/terms/telemetry Wed, 01 Apr 2026 14:53:29 GMT Automated transmission of payload data (science, engineering) from a platform to receiving equipment via telemetry link, excluding commands, tracking, memory transfers, audio, or video. https://ceos-org.github.io/eo-glossary/terms/telemetry_data https://ceos-org.github.io/eo-glossary/terms/telemetry_data Wed, 01 Apr 2026 14:53:29 GMT Data stream of measured values (instrument science, instrument engineering, and spacecraftor platform engineering data), not including command, tracking, computer memory transfer, audio or video si... https://ceos-org.github.io/eo-glossary/terms/science_stewards https://ceos-org.github.io/eo-glossary/terms/science_stewards Wed, 01 Apr 2026 14:53:29 GMT Experts providing scientific oversight to ensure accurate data and metadata representation, guiding data quality, characterization, and usability requirements. https://ceos-org.github.io/eo-glossary/terms/scientific_data_formats https://ceos-org.github.io/eo-glossary/terms/scientific_data_formats Wed, 01 Apr 2026 14:53:29 GMT Structured, self-describing, open standards enabling N-dimensional scientific data representation via software libraries and machine-independent formats. https://ceos-org.github.io/eo-glossary/terms/search_and_discovery https://ceos-org.github.io/eo-glossary/terms/search_and_discovery Wed, 01 Apr 2026 14:53:29 GMT Process of locating information using search criteria and obtaining details on available products via searchable metadata, browse images, and catalogue services. https://ceos-org.github.io/eo-glossary/terms/search_and_discovery_interface https://ceos-org.github.io/eo-glossary/terms/search_and_discovery_interface Wed, 01 Apr 2026 14:53:29 GMT Web application interface enabling users to search collection or granule metadata using terms such as location, time, and characteristics. https://ceos-org.github.io/eo-glossary/terms/secondary_data https://ceos-org.github.io/eo-glossary/terms/secondary_data Wed, 01 Apr 2026 14:53:29 GMT Data used for processing or interpreting primary data. https://ceos-org.github.io/eo-glossary/terms/segregation https://ceos-org.github.io/eo-glossary/terms/segregation Wed, 01 Apr 2026 14:53:29 GMT Earth observation products with degraded quality relative to nominal standards, such as those acquired during maneuvers or special campaigns, still useful but requiring clear indication of status a... https://ceos-org.github.io/eo-glossary/terms/self_service_access_model https://ceos-org.github.io/eo-glossary/terms/self_service_access_model Wed, 01 Apr 2026 14:53:29 GMT Self-Service Access Model - a group of data access services which a user can employ to obtain data of interest without any delay as the data are immediately available. https://ceos-org.github.io/eo-glossary/terms/semantic_information https://ceos-org.github.io/eo-glossary/terms/semantic_information Wed, 01 Apr 2026 14:53:29 GMT The Representation Information that further describes the meaning beyond that provided by the Structure Information. https://ceos-org.github.io/eo-glossary/terms/sensitivity_of_a_measuring_system https://ceos-org.github.io/eo-glossary/terms/sensitivity_of_a_measuring_system Wed, 01 Apr 2026 14:53:29 GMT Quotient of the change in an indication of a measuring system and the corresponding change in a value of a quantity being measured. https://ceos-org.github.io/eo-glossary/terms/sensor https://ceos-org.github.io/eo-glossary/terms/sensor Wed, 01 Apr 2026 14:53:29 GMT Device or instrument suited (through physical/chemical interaction) to measure one or more properties of a Phenomenon and thus collect factual/objective data. https://ceos-org.github.io/eo-glossary/terms/sensor_performance_monitoring https://ceos-org.github.io/eo-glossary/terms/sensor_performance_monitoring Wed, 01 Apr 2026 14:53:29 GMT Long-term recording and trend analysis of parameters describing sensor quality and their level-0 outputs. https://ceos-org.github.io/eo-glossary/terms/service https://ceos-org.github.io/eo-glossary/terms/service Wed, 01 Apr 2026 14:53:29 GMT Output of an organization involving at least one activity performed between the organization and the customer, or a software component in a service-oriented architecture providing functionality or ... https://ceos-org.github.io/eo-glossary/terms/service_level_agreement https://ceos-org.github.io/eo-glossary/terms/service_level_agreement Wed, 01 Apr 2026 14:53:29 GMT Agreement defining expected service levels, measurement metrics, and remedies or penalties for unmet thresholds, applicable between companies or internal departments. https://ceos-org.github.io/eo-glossary/terms/software_as_a_service https://ceos-org.github.io/eo-glossary/terms/software_as_a_service Wed, 01 Apr 2026 14:53:29 GMT Software hosted and maintained by a third party, accessed via the web, with data storage and monetization managed by the host. https://ceos-org.github.io/eo-glossary/terms/source_data https://ceos-org.github.io/eo-glossary/terms/source_data Wed, 01 Apr 2026 14:53:29 GMT Data required for producing an Earth observation collection, including unenhanced satellite mission data, precision-corrected Level-1 radiance, or other pre-processed formats meeting program requir... https://ceos-org.github.io/eo-glossary/terms/spatial_completeness https://ceos-org.github.io/eo-glossary/terms/spatial_completeness Wed, 01 Apr 2026 14:53:29 GMT Presence or absence of gaps, which are missing values in an otherwise continuous spatial data series. https://ceos-org.github.io/eo-glossary/terms/spatial_consistency https://ceos-org.github.io/eo-glossary/terms/spatial_consistency Wed, 01 Apr 2026 14:53:29 GMT Condition where the spatial statistical properties of the data depend only on the underlying physical processes and not on other factors such as fusing different products or sensors. https://ceos-org.github.io/eo-glossary/terms/spatial_extent https://ceos-org.github.io/eo-glossary/terms/spatial_extent Wed, 01 Apr 2026 14:53:29 GMT Zone or region of space described by a geographic identifier in the form of a label or code, or by a bounding box. https://ceos-org.github.io/eo-glossary/terms/spatial_reference https://ceos-org.github.io/eo-glossary/terms/spatial_reference Wed, 01 Apr 2026 14:53:29 GMT Method by which location or coverage is designated (e.g., latitude and longitude). https://ceos-org.github.io/eo-glossary/terms/spatial_reporting_unit https://ceos-org.github.io/eo-glossary/terms/spatial_reporting_unit Wed, 01 Apr 2026 14:53:29 GMT Smallest spatial object of interest that may be used for reporting and for which the information should be aggregated. https://ceos-org.github.io/eo-glossary/terms/spatial_resolution https://ceos-org.github.io/eo-glossary/terms/spatial_resolution Wed, 01 Apr 2026 14:53:29 GMT ### Notes. https://ceos-org.github.io/eo-glossary/terms/spectral_band https://ceos-org.github.io/eo-glossary/terms/spectral_band Wed, 01 Apr 2026 14:53:29 GMT Part of the electromagnetic spectrum of specific wavelengths. https://ceos-org.github.io/eo-glossary/terms/spectral_bandwidth https://ceos-org.github.io/eo-glossary/terms/spectral_bandwidth Wed, 01 Apr 2026 14:53:29 GMT Range of the Spectral Band. https://ceos-org.github.io/eo-glossary/terms/spectral_resolution https://ceos-org.github.io/eo-glossary/terms/spectral_resolution Wed, 01 Apr 2026 14:53:29 GMT Measure of the ability to resolve features in the electromagnetic spectrum. https://ceos-org.github.io/eo-glossary/terms/replicability https://ceos-org.github.io/eo-glossary/terms/replicability Wed, 01 Apr 2026 14:53:29 GMT Property enabling other researchers to conduct an independent study with different data and similar but not identical methods, yet arriving at results that confirm the original study's hypothesis. https://ceos-org.github.io/eo-glossary/terms/replication https://ceos-org.github.io/eo-glossary/terms/replication Wed, 01 Apr 2026 14:53:29 GMT A Digital Migration where there is no change to the Packaging Information, the Content Information, and the PDI. https://ceos-org.github.io/eo-glossary/terms/repository https://ceos-org.github.io/eo-glossary/terms/repository Wed, 01 Apr 2026 14:53:29 GMT A metadata repository, commonly referred to as a catalog, is accessed by client applications that support user queries. https://ceos-org.github.io/eo-glossary/terms/representation_information https://ceos-org.github.io/eo-glossary/terms/representation_information Wed, 01 Apr 2026 14:53:29 GMT Information enabling digital data to be interpreted and used, including structural, semantic, and format descriptions, provided formally (e.g., XFDU) or informally (e.g., text). https://ceos-org.github.io/eo-glossary/terms/representativeness https://ceos-org.github.io/eo-glossary/terms/representativeness Wed, 01 Apr 2026 14:53:29 GMT Quality or characteristic of a measurement or Observation to accurately represent a specific geographic location, time Period, or environmental condition. https://ceos-org.github.io/eo-glossary/terms/reprocessing https://ceos-org.github.io/eo-glossary/terms/reprocessing Wed, 01 Apr 2026 14:53:29 GMT Systematic generation of a new product revision using archived lower-level products, typically triggered by an improved processing algorithm. https://ceos-org.github.io/eo-glossary/terms/reproducibility https://ceos-org.github.io/eo-glossary/terms/reproducibility Wed, 01 Apr 2026 14:53:29 GMT Validity of study results through exact reproduction using the same data and methods to verify authenticity. https://ceos-org.github.io/eo-glossary/terms/reprojection https://ceos-org.github.io/eo-glossary/terms/reprojection Wed, 01 Apr 2026 14:53:29 GMT Changing the coordinates values of a dataset from one coordinate system to another coordinate system. https://ceos-org.github.io/eo-glossary/terms/request https://ceos-org.github.io/eo-glossary/terms/request Wed, 01 Apr 2026 14:53:29 GMT A request is the generic means to use a function of an element that provides the function as its service. https://ceos-org.github.io/eo-glossary/terms/resample https://ceos-org.github.io/eo-glossary/terms/resample Wed, 01 Apr 2026 14:53:29 GMT Technique of transforming a digital image to alter resolution, orientation, or sampling points for applications in medical, industrial, and remote sensing contexts. https://ceos-org.github.io/eo-glossary/terms/research_product https://ceos-org.github.io/eo-glossary/terms/research_product Wed, 01 Apr 2026 14:53:29 GMT A data product produced at a science computing facility by a research algorithm for later migration to a community consensus algorithm and can be archived and distributed by an archive center. https://ceos-org.github.io/eo-glossary/terms/resolution https://ceos-org.github.io/eo-glossary/terms/resolution Wed, 01 Apr 2026 14:53:29 GMT ### Notes. https://ceos-org.github.io/eo-glossary/terms/rest https://ceos-org.github.io/eo-glossary/terms/rest Wed, 01 Apr 2026 14:53:29 GMT A software architectural style that defines a common method for defining APIs for Web services. https://ceos-org.github.io/eo-glossary/terms/restituted_orbit https://ceos-org.github.io/eo-glossary/terms/restituted_orbit Wed, 01 Apr 2026 14:53:29 GMT Orbit determination using delayed telemetry data with a one-day latency, computed from a three-day moving window and typically sampled every 60 seconds with lower precision than precise orbits. https://ceos-org.github.io/eo-glossary/terms/retention_period https://ceos-org.github.io/eo-glossary/terms/retention_period Wed, 01 Apr 2026 14:53:29 GMT The minimum amount of time that a key or other cryptographically related information should be retained. https://ceos-org.github.io/eo-glossary/terms/retrieval https://ceos-org.github.io/eo-glossary/terms/retrieval Wed, 01 Apr 2026 14:53:29 GMT Physical transfer of data from a repository to the user. https://ceos-org.github.io/eo-glossary/terms/sample https://ceos-org.github.io/eo-glossary/terms/sample Wed, 01 Apr 2026 14:53:29 GMT Subset of one or more entities. https://ceos-org.github.io/eo-glossary/terms/satellite_data https://ceos-org.github.io/eo-glossary/terms/satellite_data Wed, 01 Apr 2026 14:53:29 GMT Data comprising housekeeping telemetry and payload data transmitted via the payload telemetry link. https://ceos-org.github.io/eo-glossary/terms/scene https://ceos-org.github.io/eo-glossary/terms/scene Wed, 01 Apr 2026 14:53:29 GMT Subset of instrument acquisition data segmented by time across the swath. https://ceos-org.github.io/eo-glossary/terms/schema https://ceos-org.github.io/eo-glossary/terms/schema Wed, 01 Apr 2026 14:53:29 GMT The definition of a data structure such as a database or XML file. https://ceos-org.github.io/eo-glossary/terms/science_data_segment_interface https://ceos-org.github.io/eo-glossary/terms/science_data_segment_interface Wed, 01 Apr 2026 14:53:29 GMT System for assessing and verifying quality of Raw Data Records (RDRs), Sensor Data Records (SDRs), Environmental Data Records (EDRs), and Temperature Data Records (TDRs) through distributed Product... https://ceos-org.github.io/eo-glossary/terms/science_data_system https://ceos-org.github.io/eo-glossary/terms/science_data_system Wed, 01 Apr 2026 14:53:29 GMT System overseeing the lifecycle of science data from acquisition to distribution to maximize scientific return for researchers, decision makers, and society. https://ceos-org.github.io/eo-glossary/terms/provenance_information https://ceos-org.github.io/eo-glossary/terms/provenance_information Wed, 01 Apr 2026 14:53:29 GMT Information documenting the origin, history, modifications, inputs, algorithms used, and custody of content. https://ceos-org.github.io/eo-glossary/terms/provisional_product https://ceos-org.github.io/eo-glossary/terms/provisional_product Wed, 01 Apr 2026 14:53:29 GMT Products in a research and development phase not yet published into a standardized collection. https://ceos-org.github.io/eo-glossary/terms/proximity_computing https://ceos-org.github.io/eo-glossary/terms/proximity_computing Wed, 01 Apr 2026 14:53:29 GMT Computing data physically close to its source to minimize remote processing and data transfer. https://ceos-org.github.io/eo-glossary/terms/purge https://ceos-org.github.io/eo-glossary/terms/purge Wed, 01 Apr 2026 14:53:29 GMT To permanently and irrecoverably remove all copies of an Earth Observation data set held in an organization. https://ceos-org.github.io/eo-glossary/terms/quality https://ceos-org.github.io/eo-glossary/terms/quality Wed, 01 Apr 2026 14:53:29 GMT Degree to which a set of inherent characteristics of an object fulfils requirements. https://ceos-org.github.io/eo-glossary/terms/quality_assessment https://ceos-org.github.io/eo-glossary/terms/quality_assessment Wed, 01 Apr 2026 14:53:29 GMT Derivation of quality indicators sufficient to assess fulfillment of quality requirements. https://ceos-org.github.io/eo-glossary/terms/quality_assurance https://ceos-org.github.io/eo-glossary/terms/quality_assurance Wed, 01 Apr 2026 14:53:29 GMT Part of quality management focused on providing confidence that quality requirements will be fulfilled. https://ceos-org.github.io/eo-glossary/terms/quality_control https://ceos-org.github.io/eo-glossary/terms/quality_control Wed, 01 Apr 2026 14:53:29 GMT Activities to check and optimize data accuracy and precision after collection; part of quality management focused on fulfilling quality requirements. https://ceos-org.github.io/eo-glossary/terms/quality_indicator https://ceos-org.github.io/eo-glossary/terms/quality_indicator Wed, 01 Apr 2026 14:53:29 GMT Indicator providing sufficient information to allow all users to readily evaluate the fitness for purpose of the data or derived product. https://ceos-org.github.io/eo-glossary/terms/quality_information https://ceos-org.github.io/eo-glossary/terms/quality_information Wed, 01 Apr 2026 14:53:29 GMT Secondary data required to assess the primary data set’s fitness for purpose, e.g. https://ceos-org.github.io/eo-glossary/terms/quantity https://ceos-org.github.io/eo-glossary/terms/quantity Wed, 01 Apr 2026 14:53:29 GMT Property having a magnitude that can be expressed as a number from a continuous and contiguous range and a reference. https://ceos-org.github.io/eo-glossary/terms/quarantine https://ceos-org.github.io/eo-glossary/terms/quarantine Wed, 01 Apr 2026 14:53:29 GMT Withholding of an Earth observation product from distribution due to severe technical or quality issues. https://ceos-org.github.io/eo-glossary/terms/radiometric_calibration https://ceos-org.github.io/eo-glossary/terms/radiometric_calibration Wed, 01 Apr 2026 14:53:29 GMT Determination of radiometric instrument performance across spatial, spectral, and temporal domains by relating output to true radiometric values. https://ceos-org.github.io/eo-glossary/terms/random_error https://ceos-org.github.io/eo-glossary/terms/random_error Wed, 01 Apr 2026 14:53:29 GMT Component of measurement error that varies unpredictably in replicate measurements. https://ceos-org.github.io/eo-glossary/terms/raw_data https://ceos-org.github.io/eo-glossary/terms/raw_data Wed, 01 Apr 2026 14:53:29 GMT Time-ordered telemetry data from the instrument before any processing has been applied. https://ceos-org.github.io/eo-glossary/terms/readme https://ceos-org.github.io/eo-glossary/terms/readme Wed, 01 Apr 2026 14:53:29 GMT File providing metadata to ensure correct interpretation of associated data by users now or in the future. https://ceos-org.github.io/eo-glossary/terms/reconciliation https://ceos-org.github.io/eo-glossary/terms/reconciliation Wed, 01 Apr 2026 14:53:29 GMT Process of matching processed output data with relevant input data to detect unexplained losses and establish the output as the master dataset for archiving and further use. https://ceos-org.github.io/eo-glossary/terms/reference https://ceos-org.github.io/eo-glossary/terms/reference Wed, 01 Apr 2026 14:53:29 GMT Phenomenon whose values for specific properties are known and understood with an Uncertainty significantly lower (quantify?) than that of the Observation with which it is compared. https://ceos-org.github.io/eo-glossary/terms/reference_model https://ceos-org.github.io/eo-glossary/terms/reference_model Wed, 01 Apr 2026 14:53:29 GMT Conceptual framework of unifying concepts for understanding relationships among entities in an environment and developing consistent standards, particularly for archival systems preserving digital ... https://ceos-org.github.io/eo-glossary/terms/reformatting https://ceos-org.github.io/eo-glossary/terms/reformatting Wed, 01 Apr 2026 14:53:29 GMT Transformation process converting data from one format to another, including reorganization, relocation, or dropping of fields, using well-defined rules to preserve information integrity. https://ceos-org.github.io/eo-glossary/terms/refreshment https://ceos-org.github.io/eo-glossary/terms/refreshment Wed, 01 Apr 2026 14:53:29 GMT A digital migration where the effect is to replacea media instance with a copy that is sufficiently exact so that all archival storage hardware and software continues to run as before. https://ceos-org.github.io/eo-glossary/terms/relative_standard_uncertainty https://ceos-org.github.io/eo-glossary/terms/relative_standard_uncertainty Wed, 01 Apr 2026 14:53:29 GMT Standard measurement uncertainty divided by the absolute value of the measured quantity value. https://ceos-org.github.io/eo-glossary/terms/remote_sensing https://ceos-org.github.io/eo-glossary/terms/remote_sensing Wed, 01 Apr 2026 14:53:29 GMT Type of Observation performed at a significant distance from a Phenomenon. https://ceos-org.github.io/eo-glossary/terms/repackaging https://ceos-org.github.io/eo-glossary/terms/repackaging Wed, 01 Apr 2026 14:53:29 GMT Repackaging is a digital migration which alters the packaging information of the AIP. https://ceos-org.github.io/eo-glossary/terms/repeatability https://ceos-org.github.io/eo-glossary/terms/repeatability Wed, 01 Apr 2026 14:53:29 GMT Measurement precision under conditions including the same procedure, location, equipment, and replicate measurements on similar objects over time. https://ceos-org.github.io/eo-glossary/terms/precise_orbit https://ceos-org.github.io/eo-glossary/terms/precise_orbit Wed, 01 Apr 2026 14:53:29 GMT Orbit model derived from all available satellite tracking data and dynamical corrections, achieving highest accuracy. https://ceos-org.github.io/eo-glossary/terms/precision https://ceos-org.github.io/eo-glossary/terms/precision Wed, 01 Apr 2026 14:53:29 GMT Closeness of agreement between indications or measured values obtained by replicate measurements on the same or similar objects under specified conditions. https://ceos-org.github.io/eo-glossary/terms/predicted_orbit https://ceos-org.github.io/eo-glossary/terms/predicted_orbit Wed, 01 Apr 2026 14:53:29 GMT These state vectors are calculated (e.g. https://ceos-org.github.io/eo-glossary/terms/preliminary_orbit https://ceos-org.github.io/eo-glossary/terms/preliminary_orbit Wed, 01 Apr 2026 14:53:29 GMT Preliminary orbits are based on the fast delivery tracking data. https://ceos-org.github.io/eo-glossary/terms/preservation https://ceos-org.github.io/eo-glossary/terms/preservation Wed, 01 Apr 2026 14:53:29 GMT Processes and operations used to ensure data technical and intellectual survival through time. https://ceos-org.github.io/eo-glossary/terms/preservation_description_information https://ceos-org.github.io/eo-glossary/terms/preservation_description_information Wed, 01 Apr 2026 14:53:29 GMT Reference, context, provenance, and fixity information, which is required for adequate preservation of the content information. https://ceos-org.github.io/eo-glossary/terms/preservation_workflow https://ceos-org.github.io/eo-glossary/terms/preservation_workflow Wed, 01 Apr 2026 14:53:29 GMT A set of actions recommended for the preservation of an “EO Missions/Sensors data set” (i.e. https://ceos-org.github.io/eo-glossary/terms/preserved_data_set_content https://ceos-org.github.io/eo-glossary/terms/preserved_data_set_content Wed, 01 Apr 2026 14:53:29 GMT The individual items making up a complete Earth Observation data se t to be preserved, including data records , and the a ssociated knowledge , i.e. https://ceos-org.github.io/eo-glossary/terms/primary_data https://ceos-org.github.io/eo-glossary/terms/primary_data Wed, 01 Apr 2026 14:53:29 GMT A set of results from a scientific observation, i.e. https://ceos-org.github.io/eo-glossary/terms/procedure https://ceos-org.github.io/eo-glossary/terms/procedure Wed, 01 Apr 2026 14:53:29 GMT Specified way to carry out an activity or a process. https://ceos-org.github.io/eo-glossary/terms/process https://ceos-org.github.io/eo-glossary/terms/process Wed, 01 Apr 2026 14:53:29 GMT Series of activities that interact to produce a result. https://ceos-org.github.io/eo-glossary/terms/process_validation https://ceos-org.github.io/eo-glossary/terms/process_validation Wed, 01 Apr 2026 14:53:29 GMT Established documented evidence providing high assurance that a process consistently produces products meeting predefined specifications and quality characteristics. https://ceos-org.github.io/eo-glossary/terms/processing https://ceos-org.github.io/eo-glossary/terms/processing Wed, 01 Apr 2026 14:53:29 GMT Generation of higher-level products from lower-level and auxiliary products using version-controlled core algorithms supplemented by administrative functions. https://ceos-org.github.io/eo-glossary/terms/processing_baseline https://ceos-org.github.io/eo-glossary/terms/processing_baseline Wed, 01 Apr 2026 14:53:29 GMT A combination of processor versions, auxiliary data and other needed enablers that allows the generation of a coherent set of EO products. https://ceos-org.github.io/eo-glossary/terms/processing_levels https://ceos-org.github.io/eo-glossary/terms/processing_levels Wed, 01 Apr 2026 14:53:29 GMT Raw Data https://ceos-org.github.io/eo-glossary/terms/producer https://ceos-org.github.io/eo-glossary/terms/producer Wed, 01 Apr 2026 14:53:29 GMT Role of persons or systems providing information to be preserved, including other OAISs or internal entities. https://ceos-org.github.io/eo-glossary/terms/product https://ceos-org.github.io/eo-glossary/terms/product Wed, 01 Apr 2026 14:53:29 GMT Electronic data package distributable to users; content is derived from instrument data via processing involving ancillary and auxiliary data. https://ceos-org.github.io/eo-glossary/terms/product_area https://ceos-org.github.io/eo-glossary/terms/product_area Wed, 01 Apr 2026 14:53:29 GMT Suite of products organized by thematic category into foundational data, geophysical products, and analytical reports. https://ceos-org.github.io/eo-glossary/terms/product_quality_control https://ceos-org.github.io/eo-glossary/terms/product_quality_control Wed, 01 Apr 2026 14:53:29 GMT Determination of quality parameters for individual products through automated or manual activities such as quick look visualization. https://ceos-org.github.io/eo-glossary/terms/product_team https://ceos-org.github.io/eo-glossary/terms/product_team Wed, 01 Apr 2026 14:53:29 GMT Scientifically knowledgeable team ensuring products are generated, high quality, well documented, and delivered to the archive. https://ceos-org.github.io/eo-glossary/terms/product_type_collection https://ceos-org.github.io/eo-glossary/terms/product_type_collection Wed, 01 Apr 2026 14:53:29 GMT Ensemble of all available products of a specific product type. https://ceos-org.github.io/eo-glossary/terms/production_request https://ceos-org.github.io/eo-glossary/terms/production_request Wed, 01 Apr 2026 14:53:29 GMT Request for producing one or more products, typically tied to a user order and parameterized with processing, input, and optional output parameters. https://ceos-org.github.io/eo-glossary/terms/property https://ceos-org.github.io/eo-glossary/terms/property Wed, 01 Apr 2026 14:53:29 GMT Observable Trait. https://ceos-org.github.io/eo-glossary/terms/provenance https://ceos-org.github.io/eo-glossary/terms/provenance Wed, 01 Apr 2026 14:53:29 GMT Information documenting the origin, history, modifications, inputs, algorithms used, and custody of content. https://ceos-org.github.io/eo-glossary/terms/outcome https://ceos-org.github.io/eo-glossary/terms/outcome Wed, 01 Apr 2026 14:53:29 GMT ### Notes. https://ceos-org.github.io/eo-glossary/terms/outreach https://ceos-org.github.io/eo-glossary/terms/outreach Wed, 01 Apr 2026 14:53:29 GMT The act of inviting users (or stakeholders more broadly) to engage in a mutually beneficial exchange. https://ceos-org.github.io/eo-glossary/terms/packaging_information https://ceos-org.github.io/eo-glossary/terms/packaging_information Wed, 01 Apr 2026 14:53:29 GMT A description of the package, which allows the user to understand the structure of the information package. https://ceos-org.github.io/eo-glossary/terms/parameter https://ceos-org.github.io/eo-glossary/terms/parameter Wed, 01 Apr 2026 14:53:29 GMT A measurable or derived variable occurring in the physical or digital world. https://ceos-org.github.io/eo-glossary/terms/path https://ceos-org.github.io/eo-glossary/terms/path Wed, 01 Apr 2026 14:53:29 GMT Line defined in an algorithmic way using at least two positions (can be open-ended). https://ceos-org.github.io/eo-glossary/terms/payload_data https://ceos-org.github.io/eo-glossary/terms/payload_data Wed, 01 Apr 2026 14:53:29 GMT Data transmitted via the payload telemetry link, presented as instrument data, platform ancillary data, and housekeeping telemetry after packet extraction and reordering. https://ceos-org.github.io/eo-glossary/terms/payload_data_ground_segment https://ceos-org.github.io/eo-glossary/terms/payload_data_ground_segment Wed, 01 Apr 2026 14:53:29 GMT The personnel and elements performing mission operations related to payload data. https://ceos-org.github.io/eo-glossary/terms/period https://ceos-org.github.io/eo-glossary/terms/period Wed, 01 Apr 2026 14:53:29 GMT Particular era or span of time. https://ceos-org.github.io/eo-glossary/terms/period_identifier https://ceos-org.github.io/eo-glossary/terms/period_identifier Wed, 01 Apr 2026 14:53:29 GMT Temporal reference in the form of a label or code that identifies a Period. https://ceos-org.github.io/eo-glossary/terms/phenomenon https://ceos-org.github.io/eo-glossary/terms/phenomenon Wed, 01 Apr 2026 14:53:29 GMT Entity with at least one Property referenced by an identifier. https://ceos-org.github.io/eo-glossary/terms/physical_medium https://ceos-org.github.io/eo-glossary/terms/physical_medium Wed, 01 Apr 2026 14:53:29 GMT Any physical material capable of holding data(e.g., pages, film, magnetic tape, optical disk, wire, silicon). https://ceos-org.github.io/eo-glossary/terms/place https://ceos-org.github.io/eo-glossary/terms/place Wed, 01 Apr 2026 14:53:29 GMT Part of any space referenced by an identifier. https://ceos-org.github.io/eo-glossary/terms/platform https://ceos-org.github.io/eo-glossary/terms/platform Wed, 01 Apr 2026 14:53:29 GMT Support carrying instrument(s) or sensor(s), such as a spacecraft, aircraft, or ground-based platform. https://ceos-org.github.io/eo-glossary/terms/point_to_area_representativeness https://ceos-org.github.io/eo-glossary/terms/point_to_area_representativeness Wed, 01 Apr 2026 14:53:29 GMT The probability that a point measurement lies within a specific range of area-average (volume-average) concentration value. https://ceos-org.github.io/eo-glossary/terms/policy https://ceos-org.github.io/eo-glossary/terms/policy Wed, 01 Apr 2026 14:53:29 GMT Deliberate system of guidelines to guide decisions and achieve rational outcomes. https://ceos-org.github.io/eo-glossary/terms/policy_cycle https://ceos-org.github.io/eo-glossary/terms/policy_cycle Wed, 01 Apr 2026 14:53:29 GMT Well-established concept, typically taught as the rational model of policy decision-making. https://ceos-org.github.io/eo-glossary/terms/policy_file https://ceos-org.github.io/eo-glossary/terms/policy_file Wed, 01 Apr 2026 14:53:29 GMT Policy documents that represent the official written reference for a given Policy. https://ceos-org.github.io/eo-glossary/terms/policy_making https://ceos-org.github.io/eo-glossary/terms/policy_making Wed, 01 Apr 2026 14:53:29 GMT Process by which governments translate their political vision into programmes and actions to deliver outcomes — desired change in the real world. https://ceos-org.github.io/eo-glossary/terms/policy_milestone https://ceos-org.github.io/eo-glossary/terms/policy_milestone Wed, 01 Apr 2026 14:53:29 GMT Markers of significant progress in addressing specific issues, or crucial decision points where significant choices are made. https://ceos-org.github.io/eo-glossary/terms/policy_objective https://ceos-org.github.io/eo-glossary/terms/policy_objective Wed, 01 Apr 2026 14:53:29 GMT Desired outcome that policymakers wish to achieve. https://ceos-org.github.io/eo-glossary/terms/policy_target https://ceos-org.github.io/eo-glossary/terms/policy_target Wed, 01 Apr 2026 14:53:29 GMT Specific level or rate set for the Policy Objective. https://ceos-org.github.io/eo-glossary/terms/position https://ceos-org.github.io/eo-glossary/terms/position Wed, 01 Apr 2026 14:53:29 GMT Place referenced by a single set of coordinates within a coordinate reference system. https://ceos-org.github.io/eo-glossary/terms/positional_accuracy https://ceos-org.github.io/eo-glossary/terms/positional_accuracy Wed, 01 Apr 2026 14:53:29 GMT Closeness of coordinate value to the true or accepted value in a specified reference system. https://ceos-org.github.io/eo-glossary/terms/monitoring_and_control https://ceos-org.github.io/eo-glossary/terms/monitoring_and_control Wed, 01 Apr 2026 14:53:29 GMT Function ensuring nominal operation of ground segment resources and making activities visible and traceable through operator interaction for failure handling. https://ceos-org.github.io/eo-glossary/terms/near_real_time https://ceos-org.github.io/eo-glossary/terms/near_real_time Wed, 01 Apr 2026 14:53:29 GMT Data available with a small, application-dependent latency, typically 3 hours in meteorological applications. https://ceos-org.github.io/eo-glossary/terms/near_real_time_data https://ceos-org.github.io/eo-glossary/terms/near_real_time_data Wed, 01 Apr 2026 14:53:29 GMT Data available for use with a specified (small and application dependent) latency, typically 3 hours for meteorological applications. https://ceos-org.github.io/eo-glossary/terms/notification https://ceos-org.github.io/eo-glossary/terms/notification Wed, 01 Apr 2026 14:53:29 GMT Function that informs registered recipients—internal ground segment elements or external users—about events in payload data. https://ceos-org.github.io/eo-glossary/terms/object https://ceos-org.github.io/eo-glossary/terms/object Wed, 01 Apr 2026 14:53:29 GMT Entity with a well-defined boundary and identity that encapsulates state and behaviour. https://ceos-org.github.io/eo-glossary/terms/observation https://ceos-org.github.io/eo-glossary/terms/observation Wed, 01 Apr 2026 14:53:29 GMT Act of determining the Value of a Property by interacting in a reproducible way with the Phenomenon using a Sensor. https://ceos-org.github.io/eo-glossary/terms/obsolete_product_or_collection https://ceos-org.github.io/eo-glossary/terms/obsolete_product_or_collection Wed, 01 Apr 2026 14:53:29 GMT Products or collections which have been superseded by later versions of a product or collection. https://ceos-org.github.io/eo-glossary/terms/on_demand_data_set https://ceos-org.github.io/eo-glossary/terms/on_demand_data_set Wed, 01 Apr 2026 14:53:29 GMT Collection of products that are generated in response to a user’s request. https://ceos-org.github.io/eo-glossary/terms/on_the_fly_processing https://ceos-org.github.io/eo-glossary/terms/on_the_fly_processing Wed, 01 Apr 2026 14:53:29 GMT Fully automated generation of a requested product for immediate download, with processing time not exceeding 10 minutes. https://ceos-org.github.io/eo-glossary/terms/online_access https://ceos-org.github.io/eo-glossary/terms/online_access Wed, 01 Apr 2026 14:53:29 GMT Function providing direct online availability of products for user download. https://ceos-org.github.io/eo-glossary/terms/open_access https://ceos-org.github.io/eo-glossary/terms/open_access Wed, 01 Apr 2026 14:53:29 GMT Principle that published research outputs, especially from publicly-funded work, should be freely accessible to all without subscription barriers. https://ceos-org.github.io/eo-glossary/terms/open_archival_information_system https://ceos-org.github.io/eo-glossary/terms/open_archival_information_system Wed, 01 Apr 2026 14:53:29 GMT Organization with people and systems responsible for preserving information and making it available to a designated community, meeting defined archival responsibilities. https://ceos-org.github.io/eo-glossary/terms/open_data https://ceos-org.github.io/eo-glossary/terms/open_data Wed, 01 Apr 2026 14:53:29 GMT Data freely accessible, usable, modifiable, and shareable for any purpose, subject only to attribution or share-alike requirements, as defined by the Open Definition. https://ceos-org.github.io/eo-glossary/terms/open_science https://ceos-org.github.io/eo-glossary/terms/open_science Wed, 01 Apr 2026 14:53:29 GMT Practice of science adhering to open principles, including open access publishing, sharing research data and source code as open data, and using open-source tools. https://ceos-org.github.io/eo-glossary/terms/open_source https://ceos-org.github.io/eo-glossary/terms/open_source Wed, 01 Apr 2026 14:53:29 GMT Software with source code available under an open license, permitting free use, inspection, modification, and redistribution by users with technical capability. https://ceos-org.github.io/eo-glossary/terms/operational_data_store https://ceos-org.github.io/eo-glossary/terms/operational_data_store Wed, 01 Apr 2026 14:53:29 GMT Database optimized for frequent queries on transactional data, updated during business operations and typically serving as an interim staging area for a data warehouse. https://ceos-org.github.io/eo-glossary/terms/operational_product https://ceos-org.github.io/eo-glossary/terms/operational_product Wed, 01 Apr 2026 14:53:29 GMT It is recognized as an important data source for the data repository and operational reporting. https://ceos-org.github.io/eo-glossary/terms/operational_scenario https://ceos-org.github.io/eo-glossary/terms/operational_scenario Wed, 01 Apr 2026 14:53:29 GMT Pre-defined end-to-end flow of operation characterized with respect to the implemented overall data flow and interaction between the external entities and the PDGS system components. https://ceos-org.github.io/eo-glossary/terms/operations https://ceos-org.github.io/eo-glossary/terms/operations Wed, 01 Apr 2026 14:53:29 GMT Activities directly related to the acquisition, archiving, distribution, and processing of mission-related information. https://ceos-org.github.io/eo-glossary/terms/operations_center https://ceos-org.github.io/eo-glossary/terms/operations_center Wed, 01 Apr 2026 14:53:29 GMT Physical location where “ Facilities ” are operated and/or coordinated, comprising infrastructure, human resources, operational procedures, etc. https://ceos-org.github.io/eo-glossary/terms/operator https://ceos-org.github.io/eo-glossary/terms/operator Wed, 01 Apr 2026 14:53:29 GMT Part of the PDGS being in charge of the management of the PDGS systems and operational procedures in order to provide the PDGS services to the users. https://ceos-org.github.io/eo-glossary/terms/orbit https://ceos-org.github.io/eo-glossary/terms/orbit Wed, 01 Apr 2026 14:53:29 GMT Path in space described by a satellite revolving around the Earth under mutual gravitational attraction. https://ceos-org.github.io/eo-glossary/terms/orbit_prediction_and_determination https://ceos-org.github.io/eo-glossary/terms/orbit_prediction_and_determination Wed, 01 Apr 2026 14:53:29 GMT Generation of attitude and state vectors to describe spacecraft position over time, computed either in advance (predicted) or after observation (restituted or precise). https://ceos-org.github.io/eo-glossary/terms/order_agreement https://ceos-org.github.io/eo-glossary/terms/order_agreement Wed, 01 Apr 2026 14:53:29 GMT Agreement specifying physical delivery details of data, such as media type and format. https://ceos-org.github.io/eo-glossary/terms/order_fulfillment_access_model https://ceos-org.github.io/eo-glossary/terms/order_fulfillment_access_model Wed, 01 Apr 2026 14:53:29 GMT Group of data access services enabling delayed delivery due to non-immediate availability or need for formatting, transformation, or packaging. https://ceos-org.github.io/eo-glossary/terms/long_term_archive https://ceos-org.github.io/eo-glossary/terms/long_term_archive Wed, 01 Apr 2026 14:53:29 GMT System for long-term storage of data, separated from primary media for compliance or archival purposes, organized as files or cataloged structures. https://ceos-org.github.io/eo-glossary/terms/long_term_preservation https://ceos-org.github.io/eo-glossary/terms/long_term_preservation Wed, 01 Apr 2026 14:53:29 GMT The act of maintaining information in a correct and independently understandable form over the long term. https://ceos-org.github.io/eo-glossary/terms/machine_learning https://ceos-org.github.io/eo-glossary/terms/machine_learning Wed, 01 Apr 2026 14:53:29 GMT The use and development of computer systems that are able to learn and adapt without following explicit instructions, by using algorithms and statistical models to analyze and draw inferences from ... https://ceos-org.github.io/eo-glossary/terms/maintenance https://ceos-org.github.io/eo-glossary/terms/maintenance Wed, 01 Apr 2026 14:53:29 GMT Activities sustaining equipment and software in current operational configuration. https://ceos-org.github.io/eo-glossary/terms/master_data_record https://ceos-org.github.io/eo-glossary/terms/master_data_record Wed, 01 Apr 2026 14:53:29 GMT Consolidated and quality-checked data record resulting from consolidation procedures, used for preservation, dissemination, and further processing in Earth Observation data stewardship. https://ceos-org.github.io/eo-glossary/terms/maturity_matrix https://ceos-org.github.io/eo-glossary/terms/maturity_matrix Wed, 01 Apr 2026 14:53:29 GMT Maturity Matrix/Model is a measurement of the ability of an organization for continuous improvement in a particular discipline. https://ceos-org.github.io/eo-glossary/terms/measurand https://ceos-org.github.io/eo-glossary/terms/measurand Wed, 01 Apr 2026 14:53:29 GMT Particular Quantity subject to Measurement. https://ceos-org.github.io/eo-glossary/terms/measurement https://ceos-org.github.io/eo-glossary/terms/measurement Wed, 01 Apr 2026 14:53:29 GMT Observation of a Quantity. https://ceos-org.github.io/eo-glossary/terms/measurement_procedure https://ceos-org.github.io/eo-glossary/terms/measurement_procedure Wed, 01 Apr 2026 14:53:29 GMT Detailed description of a measurement based on one or more principles and methods, including the measurement model and all calculations to obtain a result. https://ceos-org.github.io/eo-glossary/terms/measurement_uncertainty https://ceos-org.github.io/eo-glossary/terms/measurement_uncertainty Wed, 01 Apr 2026 14:53:29 GMT Uncertainty associated with the method of Measurement. https://ceos-org.github.io/eo-glossary/terms/metadata https://ceos-org.github.io/eo-glossary/terms/metadata Wed, 01 Apr 2026 14:53:29 GMT Data describing other data, providing an understanding of the content and utility of a product or collection. https://ceos-org.github.io/eo-glossary/terms/methodology https://ceos-org.github.io/eo-glossary/terms/methodology Wed, 01 Apr 2026 14:53:29 GMT A generalised description of an approach or set of approaches to carry out a particular task. https://ceos-org.github.io/eo-glossary/terms/metrics https://ceos-org.github.io/eo-glossary/terms/metrics Wed, 01 Apr 2026 14:53:29 GMT Tools designed to facilitate decision making and improve performance and accountability through collection, analysis, and reporting of relevant performance-related data. https://ceos-org.github.io/eo-glossary/terms/migration https://ceos-org.github.io/eo-glossary/terms/migration Wed, 01 Apr 2026 14:53:29 GMT Transfer of digital information to new hardware or software environments to preserve it and overcome technological obsolescence, excluding format conversion as reprocessing. https://ceos-org.github.io/eo-glossary/terms/minimum_mapping_unit https://ceos-org.github.io/eo-glossary/terms/minimum_mapping_unit Wed, 01 Apr 2026 14:53:29 GMT The area of the smallest Feature that is still represented on a map. https://ceos-org.github.io/eo-glossary/terms/minimum_mapping_width https://ceos-org.github.io/eo-glossary/terms/minimum_mapping_width Wed, 01 Apr 2026 14:53:29 GMT The width of the smallest linear Feature that is still represented on a map. https://ceos-org.github.io/eo-glossary/terms/mission_phase https://ceos-org.github.io/eo-glossary/terms/mission_phase Wed, 01 Apr 2026 14:53:29 GMT Mission Specific period characterized by a set of parameters (e.g. https://ceos-org.github.io/eo-glossary/terms/mission_planning https://ceos-org.github.io/eo-glossary/terms/mission_planning Wed, 01 Apr 2026 14:53:29 GMT Computation of non-conflicting timelines for space payload activities and ground station reception, accounting for budgets, capacities, and station availabilities, including cross-mission conflict ... https://ceos-org.github.io/eo-glossary/terms/model https://ceos-org.github.io/eo-glossary/terms/model Wed, 01 Apr 2026 14:53:29 GMT An, often numeric, theoretical (or otherwise abstract) representation of an Entity intended to generate Data describing one or more of its traits (as a result of pre-set conditions). https://ceos-org.github.io/eo-glossary/terms/monitoring https://ceos-org.github.io/eo-glossary/terms/monitoring Wed, 01 Apr 2026 14:53:29 GMT (1) systematic evaluation over time of some quantity https://ceos-org.github.io/eo-glossary/terms/instrument_source_packet https://ceos-org.github.io/eo-glossary/terms/instrument_source_packet Wed, 01 Apr 2026 14:53:29 GMT An individual packet of data formatted by the instrument and reconstituted from within the descrambled VCDUs. https://ceos-org.github.io/eo-glossary/terms/instrumental_drift https://ceos-org.github.io/eo-glossary/terms/instrumental_drift Wed, 01 Apr 2026 14:53:29 GMT Continuous or incremental change over time in indication, due to changes in metrological properties of a measuring instrument. https://ceos-org.github.io/eo-glossary/terms/intelligent_filtering https://ceos-org.github.io/eo-glossary/terms/intelligent_filtering Wed, 01 Apr 2026 14:53:29 GMT Software components within the management system that perform this preprocessing task. https://ceos-org.github.io/eo-glossary/terms/inter_project_agreement https://ceos-org.github.io/eo-glossary/terms/inter_project_agreement Wed, 01 Apr 2026 14:53:29 GMT IPAs are agreements between ESDIS and projects not managed by ESDIS. https://ceos-org.github.io/eo-glossary/terms/interface_control_document https://ceos-org.github.io/eo-glossary/terms/interface_control_document Wed, 01 Apr 2026 14:53:29 GMT ICDs are used to record design agreements for the interfaces between participating organizations. https://ceos-org.github.io/eo-glossary/terms/interferometric_baseline https://ceos-org.github.io/eo-glossary/terms/interferometric_baseline Wed, 01 Apr 2026 14:53:29 GMT Accurate determination of orbital distances between satellites with compatible orbits, required for SAR and differential interferometry applications. https://ceos-org.github.io/eo-glossary/terms/interoperability https://ceos-org.github.io/eo-glossary/terms/interoperability Wed, 01 Apr 2026 14:53:29 GMT Ability of different information technology systems and software applications to communicate, exchange data, and use the exchanged information, including interoperable discovery and access across c... https://ceos-org.github.io/eo-glossary/terms/interoperable_products https://ceos-org.github.io/eo-glossary/terms/interoperable_products Wed, 01 Apr 2026 14:53:29 GMT Set of two or more ARD products sufficiently documented to enable processing across a continuum of geometric and/or radiometric standards for direct quantitative comparison. https://ceos-org.github.io/eo-glossary/terms/inventory https://ceos-org.github.io/eo-glossary/terms/inventory Wed, 01 Apr 2026 14:53:29 GMT Organization capability for archiving management, enabling grouping, searching, and identification of data products for retrieval, statistics, and reorganization; also refers to the list of availab... https://ceos-org.github.io/eo-glossary/terms/inventory_service https://ceos-org.github.io/eo-glossary/terms/inventory_service Wed, 01 Apr 2026 14:53:29 GMT Part of a Catalogue Service containing information to identify and retrieve individual granules given variable ranges, including extracted granule metadata and ordering details. https://ceos-org.github.io/eo-glossary/terms/inventory_system https://ceos-org.github.io/eo-glossary/terms/inventory_system Wed, 01 Apr 2026 14:53:29 GMT A specific implementation of an inventory service. https://ceos-org.github.io/eo-glossary/terms/knowledge_information_package https://ceos-org.github.io/eo-glossary/terms/knowledge_information_package Wed, 01 Apr 2026 14:53:29 GMT Information package containing consolidated data records and associated knowledge for a specific product type of an EO mission instrument, tailored to the designated community. https://ceos-org.github.io/eo-glossary/terms/knowledge_transfer_file https://ceos-org.github.io/eo-glossary/terms/knowledge_transfer_file Wed, 01 Apr 2026 14:53:29 GMT ### Notes https://ceos-org.github.io/eo-glossary/terms/laboratory_observation https://ceos-org.github.io/eo-glossary/terms/laboratory_observation Wed, 01 Apr 2026 14:53:29 GMT Usually in-situ observations in which the Object or Phenomenon is isolated from other systems or altered in its original conditions or environment. https://ceos-org.github.io/eo-glossary/terms/latency https://ceos-org.github.io/eo-glossary/terms/latency Wed, 01 Apr 2026 14:53:29 GMT Period between the end of sensing of a Phenomenon to the beginning of availability of a specific product. https://ceos-org.github.io/eo-glossary/terms/lead_time https://ceos-org.github.io/eo-glossary/terms/lead_time Wed, 01 Apr 2026 14:53:29 GMT Minimum time of interval between an Observation being tasked and being performed. https://ceos-org.github.io/eo-glossary/terms/lifecycle https://ceos-org.github.io/eo-glossary/terms/lifecycle Wed, 01 Apr 2026 14:53:29 GMT Evolution of a system, product, service, project, or other human-made entity from conception through retirement. https://ceos-org.github.io/eo-glossary/terms/lineage https://ceos-org.github.io/eo-glossary/terms/lineage Wed, 01 Apr 2026 14:53:29 GMT The history of processing of a data element, which may include point-to-point data flows and the data actions performed upon the data element. https://ceos-org.github.io/eo-glossary/terms/lithosphere https://ceos-org.github.io/eo-glossary/terms/lithosphere Wed, 01 Apr 2026 14:53:29 GMT The solid, inanimate outer layer of the Geosphere. https://ceos-org.github.io/eo-glossary/terms/location https://ceos-org.github.io/eo-glossary/terms/location Wed, 01 Apr 2026 14:53:29 GMT Particular Place referenced by an identifier. https://ceos-org.github.io/eo-glossary/terms/location_error https://ceos-org.github.io/eo-glossary/terms/location_error Wed, 01 Apr 2026 14:53:29 GMT Measure of the agreement between the represented Location of an Object and the true Location. https://ceos-org.github.io/eo-glossary/terms/logical_record https://ceos-org.github.io/eo-glossary/terms/logical_record Wed, 01 Apr 2026 14:53:29 GMT Logical unit of information defined by content, function, and use rather than physical storage; portions may span multiple physical records or multiple logical records may reside in one. https://ceos-org.github.io/eo-glossary/terms/logical_volume https://ceos-org.github.io/eo-glossary/terms/logical_volume Wed, 01 Apr 2026 14:53:29 GMT That portion of a volume which is viewed by acomputer operating system as a volume. https://ceos-org.github.io/eo-glossary/terms/heterogeneous_data https://ceos-org.github.io/eo-glossary/terms/heterogeneous_data Wed, 01 Apr 2026 14:53:29 GMT Heterogeneous data are any data with high variability of data types and formats. https://ceos-org.github.io/eo-glossary/terms/homogeneous_data https://ceos-org.github.io/eo-glossary/terms/homogeneous_data Wed, 01 Apr 2026 14:53:29 GMT Data drawn from a single population with constant external influences throughout the observation period. https://ceos-org.github.io/eo-glossary/terms/homogenisation https://ceos-org.github.io/eo-glossary/terms/homogenisation Wed, 01 Apr 2026 14:53:29 GMT Unlike harmonisation, homogenisation is where all satellites are forced to look the same such that when looking at the same location at the same time they would (in theory) give the same signal. https://ceos-org.github.io/eo-glossary/terms/housekeeping_telemetry https://ceos-org.github.io/eo-glossary/terms/housekeeping_telemetry Wed, 01 Apr 2026 14:53:29 GMT Housekeeping telemetry (HKTM) is all the telemetry necessary to monitor the health and status of the satellite and transmitted through the telemetry link. https://ceos-org.github.io/eo-glossary/terms/hydrosphere https://ceos-org.github.io/eo-glossary/terms/hydrosphere Wed, 01 Apr 2026 14:53:29 GMT The masses of liquid water, such as oceans, lakes, and rivers. https://ceos-org.github.io/eo-glossary/terms/impact https://ceos-org.github.io/eo-glossary/terms/impact Wed, 01 Apr 2026 14:53:29 GMT Regarded long-term according to X. https://ceos-org.github.io/eo-glossary/terms/import https://ceos-org.github.io/eo-glossary/terms/import Wed, 01 Apr 2026 14:53:29 GMT Automated or semi-automated input of data sets between different software applications. https://ceos-org.github.io/eo-glossary/terms/in-situ_observation https://ceos-org.github.io/eo-glossary/terms/in-situ_observation Wed, 01 Apr 2026 14:53:29 GMT Observations performed in the same Place where a Phenomenon occurs, normally without isolating it from other systems (its environment) or altering its pre-Observation state. https://ceos-org.github.io/eo-glossary/terms/in_situ_measurement https://ceos-org.github.io/eo-glossary/terms/in_situ_measurement Wed, 01 Apr 2026 14:53:29 GMT (1) a direct measurement of the measurand in its original place https://ceos-org.github.io/eo-glossary/terms/indication https://ceos-org.github.io/eo-glossary/terms/indication Wed, 01 Apr 2026 14:53:29 GMT Quantity value provided by a measuring instrument or a measuring system. https://ceos-org.github.io/eo-glossary/terms/influence_quantity https://ceos-org.github.io/eo-glossary/terms/influence_quantity Wed, 01 Apr 2026 14:53:29 GMT Quantity that affects the relation between the indication and the measurement result without affecting the measured quantity. https://ceos-org.github.io/eo-glossary/terms/information https://ceos-org.github.io/eo-glossary/terms/information Wed, 01 Apr 2026 14:53:29 GMT Result of organizing, interpreting, categorizing, or classifying data to assign meaning understandable by the addressee. https://ceos-org.github.io/eo-glossary/terms/information_object https://ceos-org.github.io/eo-glossary/terms/information_object Wed, 01 Apr 2026 14:53:29 GMT Data object combined with its representation information, enabling interpretation and exchange of meaning. https://ceos-org.github.io/eo-glossary/terms/information_package https://ceos-org.github.io/eo-glossary/terms/information_package Wed, 01 Apr 2026 14:53:29 GMT Logical container containing optional content information and associated preservation description information, with packaging and package description information for identification and search. https://ceos-org.github.io/eo-glossary/terms/information_product https://ceos-org.github.io/eo-glossary/terms/information_product Wed, 01 Apr 2026 14:53:29 GMT Product formed by selecting, acquiring, evaluating, analyzing, synthesizing, assessing, restructuring, aggregating, translating, packaging, or repackaging data and information from various sources. https://ceos-org.github.io/eo-glossary/terms/information_system https://ceos-org.github.io/eo-glossary/terms/information_system Wed, 01 Apr 2026 14:53:29 GMT System composed of hardware, software, and operational procedures for processing, storing, or transmitting data. https://ceos-org.github.io/eo-glossary/terms/ingest https://ceos-org.github.io/eo-glossary/terms/ingest Wed, 01 Apr 2026 14:53:29 GMT Process of accepting data from sources such as ground segment reception or processing, performing quality checks, extracting metadata including browse images, and forming a data product for archivi... https://ceos-org.github.io/eo-glossary/terms/ingestion https://ceos-org.github.io/eo-glossary/terms/ingestion Wed, 01 Apr 2026 14:53:29 GMT Process of accepting data from sources such as ground segment reception or processing, performing quality checks, extracting metadata including browse images, and forming a data product for archivi... https://ceos-org.github.io/eo-glossary/terms/instance https://ceos-org.github.io/eo-glossary/terms/instance Wed, 01 Apr 2026 14:53:29 GMT One operational incarnation of an element with its configuration. https://ceos-org.github.io/eo-glossary/terms/instantaneous_field_of_view https://ceos-org.github.io/eo-glossary/terms/instantaneous_field_of_view Wed, 01 Apr 2026 14:53:29 GMT A measure of the spatial resolution of a remotesensing imaging system. https://ceos-org.github.io/eo-glossary/terms/instrument https://ceos-org.github.io/eo-glossary/terms/instrument Wed, 01 Apr 2026 14:53:29 GMT Hardware system that collects scientific or operational data, or a hardware-integrated collection of one or more sensors contributing data of one type to an investigation. https://ceos-org.github.io/eo-glossary/terms/instrument_calibration https://ceos-org.github.io/eo-glossary/terms/instrument_calibration Wed, 01 Apr 2026 14:53:29 GMT Determination of parameters describing instrument characteristics for generating calibrated and comparable physical values, varying by instrument, mode, and over time due to degradation. https://ceos-org.github.io/eo-glossary/terms/instrument_data https://ceos-org.github.io/eo-glossary/terms/instrument_data Wed, 01 Apr 2026 14:53:29 GMT Data specifically associated with the instrument, either because it was generated by the instrument or included in data packets identified with that instrument. https://ceos-org.github.io/eo-glossary/terms/fundamental_climate_data_record https://ceos-org.github.io/eo-glossary/terms/fundamental_climate_data_record Wed, 01 Apr 2026 14:53:29 GMT Long-term, stabilised record of calibrated sensor observations in physical units with quantified uncertainty and associated ancillary data. https://ceos-org.github.io/eo-glossary/terms/fused_product https://ceos-org.github.io/eo-glossary/terms/fused_product Wed, 01 Apr 2026 14:53:29 GMT Derived data product created by merging two or more fully interoperable products into a single, non-reversible dataset. https://ceos-org.github.io/eo-glossary/terms/geocoding https://ceos-org.github.io/eo-glossary/terms/geocoding Wed, 01 Apr 2026 14:53:29 GMT Translation of one form of Location into another. https://ceos-org.github.io/eo-glossary/terms/geodesy https://ceos-org.github.io/eo-glossary/terms/geodesy Wed, 01 Apr 2026 14:53:29 GMT The branch of applied mathematics that deals with the measurement of the shape and area of large tracts of country, the exact position of geographical points, and the curvature, shape, and dimensio... https://ceos-org.github.io/eo-glossary/terms/geographic_coordinate_reference_system https://ceos-org.github.io/eo-glossary/terms/geographic_coordinate_reference_system Wed, 01 Apr 2026 14:53:29 GMT Coordinate Reference System (CRS) that has a geodetic Reference frame and an ellipsoidal coordinate system. https://ceos-org.github.io/eo-glossary/terms/geographic_data https://ceos-org.github.io/eo-glossary/terms/geographic_data Wed, 01 Apr 2026 14:53:29 GMT Data with implicit or explicit reference to a Location relative to the Earth. https://ceos-org.github.io/eo-glossary/terms/geographic_grid https://ceos-org.github.io/eo-glossary/terms/geographic_grid Wed, 01 Apr 2026 14:53:29 GMT Regular grid based on a Geographic Coordinate Reference System (CRS). https://ceos-org.github.io/eo-glossary/terms/geographic_identifier https://ceos-org.github.io/eo-glossary/terms/geographic_identifier Wed, 01 Apr 2026 14:53:29 GMT Spatial reference in the form of a label or code that identifies a Location. https://ceos-org.github.io/eo-glossary/terms/geolocating https://ceos-org.github.io/eo-glossary/terms/geolocating Wed, 01 Apr 2026 14:53:29 GMT Geopositioning of an Object using a Physical Sensor Model or a True Replacement Model. https://ceos-org.github.io/eo-glossary/terms/geolocation_information https://ceos-org.github.io/eo-glossary/terms/geolocation_information Wed, 01 Apr 2026 14:53:29 GMT Information used to determine geographic Location. https://ceos-org.github.io/eo-glossary/terms/geometrical_resolution https://ceos-org.github.io/eo-glossary/terms/geometrical_resolution Wed, 01 Apr 2026 14:53:29 GMT Ability of a sensor system to distinguish signals from neighboring object structures. https://ceos-org.github.io/eo-glossary/terms/geopositioning https://ceos-org.github.io/eo-glossary/terms/geopositioning Wed, 01 Apr 2026 14:53:29 GMT Determination of the geographic Position of a point (0D) or linear (1D) Feature. https://ceos-org.github.io/eo-glossary/terms/georectifying https://ceos-org.github.io/eo-glossary/terms/georectifying Wed, 01 Apr 2026 14:53:29 GMT Correcting for positional displacement with respect to the surface of the Earth. https://ceos-org.github.io/eo-glossary/terms/geospatial_data https://ceos-org.github.io/eo-glossary/terms/geospatial_data Wed, 01 Apr 2026 14:53:29 GMT Data consisting of, derived from, or relating to information that is directly linked to specific geographical locations. https://ceos-org.github.io/eo-glossary/terms/geosphere https://ceos-org.github.io/eo-glossary/terms/geosphere Wed, 01 Apr 2026 14:53:29 GMT The masses of minerals that constitute planet Earth. https://ceos-org.github.io/eo-glossary/terms/global_attribute https://ceos-org.github.io/eo-glossary/terms/global_attribute Wed, 01 Apr 2026 14:53:29 GMT Metadata providing contextual information about a dataset as a whole to enable independent usability. https://ceos-org.github.io/eo-glossary/terms/granule https://ceos-org.github.io/eo-glossary/terms/granule Wed, 01 Apr 2026 14:53:29 GMT The smallest aggregation of data which is independently managed (i.e. https://ceos-org.github.io/eo-glossary/terms/granule_metadata https://ceos-org.github.io/eo-glossary/terms/granule_metadata Wed, 01 Apr 2026 14:53:29 GMT These are metadata elements that describe a single granule of a data product. https://ceos-org.github.io/eo-glossary/terms/grid https://ceos-org.github.io/eo-glossary/terms/grid Wed, 01 Apr 2026 14:53:29 GMT Network composed of two or more sets of curves in which the members of each set intersect the members of the other sets in an algorithmic way. https://ceos-org.github.io/eo-glossary/terms/ground_sampling_distance https://ceos-org.github.io/eo-glossary/terms/ground_sampling_distance Wed, 01 Apr 2026 14:53:29 GMT linear distance between pixel centres on the ground. https://ceos-org.github.io/eo-glossary/terms/ground_truth https://ceos-org.github.io/eo-glossary/terms/ground_truth Wed, 01 Apr 2026 14:53:29 GMT Geophysical parameter data, measured or collected by other means than by the instrument itself, used as correlative or calibration/validation data for that instrument data. https://ceos-org.github.io/eo-glossary/terms/guide https://ceos-org.github.io/eo-glossary/terms/guide Wed, 01 Apr 2026 14:53:29 GMT The guide function is part of the user information function to provide information about satellites, sensors, product types and services. https://ceos-org.github.io/eo-glossary/terms/guide_service https://ceos-org.github.io/eo-glossary/terms/guide_service Wed, 01 Apr 2026 14:53:29 GMT Part of a Catalogue Service that provides detailed information concerning specific data sets which enable the user to make a detailed analysis of whether a data set or a specific granule within the... https://ceos-org.github.io/eo-glossary/terms/error https://ceos-org.github.io/eo-glossary/terms/error Wed, 01 Apr 2026 14:53:29 GMT Measured quantity value minus a reference quantity value. https://ceos-org.github.io/eo-glossary/terms/essential_climate_variable https://ceos-org.github.io/eo-glossary/terms/essential_climate_variable Wed, 01 Apr 2026 14:53:29 GMT Physical, chemical, or biological variable or group of linked variables critical to characterizing Earth’s climate and providing empirical evidence for climate understanding, prediction, and servic... https://ceos-org.github.io/eo-glossary/terms/event_based_order https://ceos-org.github.io/eo-glossary/terms/event_based_order Wed, 01 Apr 2026 14:53:29 GMT An event is any environmental observation of significance. https://ceos-org.github.io/eo-glossary/terms/expanded_uncertainty https://ceos-org.github.io/eo-glossary/terms/expanded_uncertainty Wed, 01 Apr 2026 14:53:29 GMT Standard Uncertainty multiplied by a coverage factor, k. https://ceos-org.github.io/eo-glossary/terms/exploitation https://ceos-org.github.io/eo-glossary/terms/exploitation Wed, 01 Apr 2026 14:53:29 GMT Services, applications, and platforms that process and utilize space mission data to derive meaningful information and generate benefit. https://ceos-org.github.io/eo-glossary/terms/exploitation_platform https://ceos-org.github.io/eo-glossary/terms/exploitation_platform Wed, 01 Apr 2026 14:53:29 GMT Collaborative Big Data processing environment enabling communities to share algorithms, data, and expertise for mission-specific or multi-mission research and service provisioning. https://ceos-org.github.io/eo-glossary/terms/export https://ceos-org.github.io/eo-glossary/terms/export Wed, 01 Apr 2026 14:53:29 GMT Saving a copy of a document, database, image, or video in a file format compatible with another application. https://ceos-org.github.io/eo-glossary/terms/facility https://ceos-org.github.io/eo-glossary/terms/facility Wed, 01 Apr 2026 14:53:29 GMT Grouping of functional activities operated together, including their hardware instantiation in an Operations Center. https://ceos-org.github.io/eo-glossary/terms/fair_principle https://ceos-org.github.io/eo-glossary/terms/fair_principle Wed, 01 Apr 2026 14:53:29 GMT Guiding principles for enhancing Findability, Accessibility, Interoperability, and Reuse of digital assets with machine-actionability. https://ceos-org.github.io/eo-glossary/terms/feature https://ceos-org.github.io/eo-glossary/terms/feature Wed, 01 Apr 2026 14:53:29 GMT Abstraction of real-world phenomena. https://ceos-org.github.io/eo-glossary/terms/federated_archives https://ceos-org.github.io/eo-glossary/terms/federated_archives Wed, 01 Apr 2026 14:53:29 GMT A group of Archives that has agreed to provide access to their holdings via one or more common finding aids. https://ceos-org.github.io/eo-glossary/terms/fiducial https://ceos-org.github.io/eo-glossary/terms/fiducial Wed, 01 Apr 2026 14:53:29 GMT used as a fixed standard of reference for comparison or measurement (fiducial point). https://ceos-org.github.io/eo-glossary/terms/fiducial_mark https://ceos-org.github.io/eo-glossary/terms/fiducial_mark Wed, 01 Apr 2026 14:53:29 GMT index mark on a test system that allows automatic geometric identification and orientation detection of an object using imaging systems. https://ceos-org.github.io/eo-glossary/terms/fiducial_reference_measurements https://ceos-org.github.io/eo-glossary/terms/fiducial_reference_measurements Wed, 01 Apr 2026 14:53:29 GMT Independent measurements traceable to SI standards, produced with documented uncertainties to validate satellite data. https://ceos-org.github.io/eo-glossary/terms/field_of_regard https://ceos-org.github.io/eo-glossary/terms/field_of_regard Wed, 01 Apr 2026 14:53:29 GMT an area of the object space scanned by the field-of-view of a scanning sensor. https://ceos-org.github.io/eo-glossary/terms/field_of_view https://ceos-org.github.io/eo-glossary/terms/field_of_view Wed, 01 Apr 2026 14:53:29 GMT the solid angle from which the detector receives radiation. https://ceos-org.github.io/eo-glossary/terms/file_transfer_protocol https://ceos-org.github.io/eo-glossary/terms/file_transfer_protocol Wed, 01 Apr 2026 14:53:29 GMT A protocol used to transfer files over an IP network. https://ceos-org.github.io/eo-glossary/terms/final_product_version https://ceos-org.github.io/eo-glossary/terms/final_product_version Wed, 01 Apr 2026 14:53:29 GMT Product within an EO Collection that is not expected to be updated. https://ceos-org.github.io/eo-glossary/terms/fixity_information https://ceos-org.github.io/eo-glossary/terms/fixity_information Wed, 01 Apr 2026 14:53:29 GMT The information which documents the mechanisms that ensure that the Content Information object has not been altered in an undocumented manner. https://ceos-org.github.io/eo-glossary/terms/flight_operations_segment https://ceos-org.github.io/eo-glossary/terms/flight_operations_segment Wed, 01 Apr 2026 14:53:29 GMT Personnel and elements responsible for planning, executing, and evaluating control of the space segment in orbit. https://ceos-org.github.io/eo-glossary/terms/footprint https://ceos-org.github.io/eo-glossary/terms/footprint Wed, 01 Apr 2026 14:53:29 GMT the area of a target encircled by the field-of-view of a detector of radiation, or irradiated by an active system. https://ceos-org.github.io/eo-glossary/terms/forecast_range https://ceos-org.github.io/eo-glossary/terms/forecast_range Wed, 01 Apr 2026 14:53:29 GMT The forecast period. https://ceos-org.github.io/eo-glossary/terms/frame https://ceos-org.github.io/eo-glossary/terms/frame Wed, 01 Apr 2026 14:53:29 GMT Fixed-size product generated from a longer data segment, with fixed frames having predefined geographical footprints and floating frames starting at user-chosen positions. https://ceos-org.github.io/eo-glossary/terms/function https://ceos-org.github.io/eo-glossary/terms/function Wed, 01 Apr 2026 14:53:29 GMT Self-contained software routine that performs a task by processing input values and optionally returning results. https://ceos-org.github.io/eo-glossary/terms/discovery https://ceos-org.github.io/eo-glossary/terms/discovery Wed, 01 Apr 2026 14:53:29 GMT Any service that helps the user to identify and locate EO resource starting from his needs. https://ceos-org.github.io/eo-glossary/terms/dispose https://ceos-org.github.io/eo-glossary/terms/dispose Wed, 01 Apr 2026 14:53:29 GMT Action of permanently and irrecoverably removing all copies of data held by an organization. https://ceos-org.github.io/eo-glossary/terms/dissemination https://ceos-org.github.io/eo-glossary/terms/dissemination Wed, 01 Apr 2026 14:53:29 GMT Function that delivers final products to users via physical media, electronic distribution (e.g., ftp-push), or online server access (e.g., ftp-pull), including preparation of delivery media and ma... https://ceos-org.github.io/eo-glossary/terms/dissemination_information_package https://ceos-org.github.io/eo-glossary/terms/dissemination_information_package Wed, 01 Apr 2026 14:53:29 GMT [OAIS]Information Package - derived from one or more AIPs (Archival Information Package) -supplied to the Consumer in response to a request to the OAIS. https://ceos-org.github.io/eo-glossary/terms/dissemination_request https://ceos-org.github.io/eo-glossary/terms/dissemination_request Wed, 01 Apr 2026 14:53:29 GMT Request for dissemination of specific products, parameterized by delivery method, medium, address, and product selection criteria, often part of a bulk dissemination request. https://ceos-org.github.io/eo-glossary/terms/documentation https://ceos-org.github.io/eo-glossary/terms/documentation Wed, 01 Apr 2026 14:53:29 GMT The information component of a data set's associated knowledge may include mission, instrument, calibration, and other information in the form of text documents. https://ceos-org.github.io/eo-glossary/terms/domain_expert https://ceos-org.github.io/eo-glossary/terms/domain_expert Wed, 01 Apr 2026 14:53:29 GMT Subject-matter expert with authoritative knowledge in a specific domain, especially in expert systems development. https://ceos-org.github.io/eo-glossary/terms/downlink https://ceos-org.github.io/eo-glossary/terms/downlink Wed, 01 Apr 2026 14:53:29 GMT Data stream from the satellite to a receiving station during visibility of the satellite from the station. https://ceos-org.github.io/eo-glossary/terms/duration https://ceos-org.github.io/eo-glossary/terms/duration Wed, 01 Apr 2026 14:53:29 GMT Non-negative interval Quantity of time equal to the difference between the final and initial instants of a time interval. https://ceos-org.github.io/eo-glossary/terms/dwell_time https://ceos-org.github.io/eo-glossary/terms/dwell_time Wed, 01 Apr 2026 14:53:29 GMT Time that an antenna beam spends on a target. https://ceos-org.github.io/eo-glossary/terms/earth_observation https://ceos-org.github.io/eo-glossary/terms/earth_observation Wed, 01 Apr 2026 14:53:29 GMT Science domain dealing with technologies and methods of collecting and analyzing observations about the different Earth spheres. https://ceos-org.github.io/eo-glossary/terms/earth_observation_based_output https://ceos-org.github.io/eo-glossary/terms/earth_observation_based_output Wed, 01 Apr 2026 14:53:29 GMT Higher-level processing and integration output (indicative level 4 and beyond) that goes beyond basic data processing. https://ceos-org.github.io/eo-glossary/terms/earth_observation_product https://ceos-org.github.io/eo-glossary/terms/earth_observation_product Wed, 01 Apr 2026 14:53:29 GMT Direct output from standardized satellite data processing chains (indicative levels 2 and 3), representing fundamental geophysical and biophysical variables. https://ceos-org.github.io/eo-glossary/terms/earth_spheres https://ceos-org.github.io/eo-glossary/terms/earth_spheres Wed, 01 Apr 2026 14:53:29 GMT Spheres dividing planet Earth into subsystems, which are collectives of (physical) matter sharing specific traits. https://ceos-org.github.io/eo-glossary/terms/earth_system_data_record https://ceos-org.github.io/eo-glossary/terms/earth_system_data_record Wed, 01 Apr 2026 14:53:29 GMT A unified and coherent set of observations of a given parameter of the Earth system, which is optimized to meet specific requirements in addressing science questions. https://ceos-org.github.io/eo-glossary/terms/engineering_data https://ceos-org.github.io/eo-glossary/terms/engineering_data Wed, 01 Apr 2026 14:53:29 GMT Data which describe the physical condition and operation of the platform and instruments on the platform. https://ceos-org.github.io/eo-glossary/terms/entity https://ceos-org.github.io/eo-glossary/terms/entity Wed, 01 Apr 2026 14:53:29 GMT Something that has separate and distinct existence and objective or conceptual reality. https://ceos-org.github.io/eo-glossary/terms/environmental_data_record https://ceos-org.github.io/eo-glossary/terms/environmental_data_record Wed, 01 Apr 2026 14:53:29 GMT Recorded and derived observations and measurements of physical, chemical, biological, geological, and geophysical properties of the Earth system, including correlative data, metadata, documentation... https://ceos-org.github.io/eo-glossary/terms/environmental_process https://ceos-org.github.io/eo-glossary/terms/environmental_process Wed, 01 Apr 2026 14:53:29 GMT ### Notes. https://ceos-org.github.io/eo-glossary/terms/eo_space_data https://ceos-org.github.io/eo-glossary/terms/eo_space_data Wed, 01 Apr 2026 14:53:29 GMT Earth Observation data generated by spaceborne missions or instruments owned by public or private organizations. https://ceos-org.github.io/eo-glossary/terms/eo_space_data_holders_and_archive_owners https://ceos-org.github.io/eo-glossary/terms/eo_space_data_holders_and_archive_owners Wed, 01 Apr 2026 14:53:29 GMT This category is intended to include all entities dealing with the archiving of EO space data and responsible for their preservation in the long term. https://ceos-org.github.io/eo-glossary/terms/eo_space_data_producers https://ceos-org.github.io/eo-glossary/terms/eo_space_data_producers Wed, 01 Apr 2026 14:53:29 GMT Private or public institutes responsible for Earth Observation space missions and the production of derived data products at various levels. https://ceos-org.github.io/eo-glossary/terms/eo_space_data_users https://ceos-org.github.io/eo-glossary/terms/eo_space_data_users Wed, 01 Apr 2026 14:53:29 GMT User communities that rely on Earth Observation space data and products for application areas such as climate monitoring, agriculture, or disaster response. https://ceos-org.github.io/eo-glossary/terms/equivalence https://ceos-org.github.io/eo-glossary/terms/equivalence Wed, 01 Apr 2026 14:53:29 GMT ### Notes. https://ceos-org.github.io/eo-glossary/terms/data_stewardship https://ceos-org.github.io/eo-glossary/terms/data_stewardship Wed, 01 Apr 2026 14:53:29 GMT Application of rigorous analyses and oversight to ensure data sets meet user needs, including metadata documentation, observing system feedback, inter-comparison, reprocessing, and recommendation o... https://ceos-org.github.io/eo-glossary/terms/data_system https://ceos-org.github.io/eo-glossary/terms/data_system Wed, 01 Apr 2026 14:53:29 GMT (1) A collection of hardware and software to perform one or more specific data processing, analysis, storage, retrieval or distribution functions. https://ceos-org.github.io/eo-glossary/terms/data_time_series https://ceos-org.github.io/eo-glossary/terms/data_time_series Wed, 01 Apr 2026 14:53:29 GMT A data sequence that is designed to be consistent over a defined time interval. https://ceos-org.github.io/eo-glossary/terms/data_transformation https://ceos-org.github.io/eo-glossary/terms/data_transformation Wed, 01 Apr 2026 14:53:29 GMT Process of converting data or information from one format to another, typically from a source system to a required destination format, including language or structural transformations for platform ... https://ceos-org.github.io/eo-glossary/terms/data_use_metrics https://ceos-org.github.io/eo-glossary/terms/data_use_metrics Wed, 01 Apr 2026 14:53:29 GMT Data Use Metrics represent statistics on data access volumes, user groups, usefulness/popularity of tools and services. https://ceos-org.github.io/eo-glossary/terms/data_use_policy_agreement https://ceos-org.github.io/eo-glossary/terms/data_use_policy_agreement Wed, 01 Apr 2026 14:53:29 GMT Executed agreement between a data provider and a data recipient that specifies the terms under which the data can be used. https://ceos-org.github.io/eo-glossary/terms/data_user_guide https://ceos-org.github.io/eo-glossary/terms/data_user_guide Wed, 01 Apr 2026 14:53:29 GMT A document, either on-line or hardcopy, containing the necessary information for the correct usage of the data. https://ceos-org.github.io/eo-glossary/terms/data_warehouse https://ceos-org.github.io/eo-glossary/terms/data_warehouse Wed, 01 Apr 2026 14:53:29 GMT Unified database that holds and makes accessible an organization’s entire business information with subject-based classification, normalized design, and enterprise-wide data organization. https://ceos-org.github.io/eo-glossary/terms/dataset_landing_page https://ceos-org.github.io/eo-glossary/terms/dataset_landing_page Wed, 01 Apr 2026 14:53:29 GMT Web page containing descriptive information and relevant documentation to facilitate understanding and use of a dataset. https://ceos-org.github.io/eo-glossary/terms/dead_band https://ceos-org.github.io/eo-glossary/terms/dead_band Wed, 01 Apr 2026 14:53:29 GMT maximum interval through which a value of a quantity being measured can be changed in both directions without producing a detectable change in the corresponding indication. https://ceos-org.github.io/eo-glossary/terms/decommissioned_product https://ceos-org.github.io/eo-glossary/terms/decommissioned_product Wed, 01 Apr 2026 14:53:29 GMT Products and collections that have been superseded by new versions and are no longer available. https://ceos-org.github.io/eo-glossary/terms/deprecated_product https://ceos-org.github.io/eo-glossary/terms/deprecated_product Wed, 01 Apr 2026 14:53:29 GMT Products and collections that have been superseded by a newer version and are still available, but whose use is discouraged since they will be decommissioned in the future. https://ceos-org.github.io/eo-glossary/terms/derivative_product https://ceos-org.github.io/eo-glossary/terms/derivative_product Wed, 01 Apr 2026 14:53:29 GMT Product additionally processed from baseline or unenhanced mission data. https://ceos-org.github.io/eo-glossary/terms/derived_products https://ceos-org.github.io/eo-glossary/terms/derived_products Wed, 01 Apr 2026 14:53:29 GMT Higher-level products (level 1b through 4) generated by applying calibration, geo-location transformations, and algorithms to produce sensor units or gridded geophysical parameters. https://ceos-org.github.io/eo-glossary/terms/description_information https://ceos-org.github.io/eo-glossary/terms/description_information Wed, 01 Apr 2026 14:53:29 GMT Set of information identifying an archived dataset for long-term preservation, including spatial mission and payload details, data composition, availability, time span, volume, storage media, and a... https://ceos-org.github.io/eo-glossary/terms/designated_community https://ceos-org.github.io/eo-glossary/terms/designated_community Wed, 01 Apr 2026 14:53:29 GMT Scientific or other user group in the same or related disciplines with a vested interest in the long-term availability and usability of a preserved dataset. https://ceos-org.github.io/eo-glossary/terms/detection_limit https://ceos-org.github.io/eo-glossary/terms/detection_limit Wed, 01 Apr 2026 14:53:29 GMT measured quantity value, obtained by a given measurement procedure, for which the probability of falsely claiming the absence of a component is β, given a probability α of falsely claiming its pres... https://ceos-org.github.io/eo-glossary/terms/digital_object_identifiers https://ceos-org.github.io/eo-glossary/terms/digital_object_identifiers Wed, 01 Apr 2026 14:53:29 GMT Persistent identifiers that are globally unique character strings that reference physical, digital, or abstract objects. https://ceos-org.github.io/eo-glossary/terms/directory https://ceos-org.github.io/eo-glossary/terms/directory Wed, 01 Apr 2026 14:53:29 GMT “Discovery” service for what services are available in the PDGS, i.e. https://ceos-org.github.io/eo-glossary/terms/directory_service https://ceos-org.github.io/eo-glossary/terms/directory_service Wed, 01 Apr 2026 14:53:29 GMT Descriptions of metadata or data set catalogues accessed as a component of the Catalogue Service containing high level information suitable for making an initial determination of the potential usef... https://ceos-org.github.io/eo-glossary/terms/discipline https://ceos-org.github.io/eo-glossary/terms/discipline Wed, 01 Apr 2026 14:53:29 GMT A field of study such as oceanography, meteorology, geology, or marine biology. https://ceos-org.github.io/eo-glossary/terms/data_lake https://ceos-org.github.io/eo-glossary/terms/data_lake Wed, 01 Apr 2026 14:53:29 GMT A data lake is a centralized repository that allows you to store all your structured and unstructured data at any scale. https://ceos-org.github.io/eo-glossary/terms/data_licencing https://ceos-org.github.io/eo-glossary/terms/data_licencing Wed, 01 Apr 2026 14:53:29 GMT Legal instrument by which a copyright holder may grant rights over the protected work. https://ceos-org.github.io/eo-glossary/terms/data_licensing https://ceos-org.github.io/eo-glossary/terms/data_licensing Wed, 01 Apr 2026 14:53:29 GMT Legal instrument granting rights to use protected data, where open data requires an explicitly applied license conforming to the Open Definition. https://ceos-org.github.io/eo-glossary/terms/data_management https://ceos-org.github.io/eo-glossary/terms/data_management Wed, 01 Apr 2026 14:53:29 GMT Services and functions for populating, maintaining, and accessing diverse information such as catalogs, processing algorithms, access statistics, security controls, and OAIS policies. https://ceos-org.github.io/eo-glossary/terms/data_management_plan https://ceos-org.github.io/eo-glossary/terms/data_management_plan Wed, 01 Apr 2026 14:53:29 GMT Plan describing how scientific data will be generated, processed, distributed, analyzed, archived, managed, described, stored, protected, and standardized throughout a project's lifecycle. https://ceos-org.github.io/eo-glossary/terms/data_management_services https://ceos-org.github.io/eo-glossary/terms/data_management_services Wed, 01 Apr 2026 14:53:29 GMT Services that enforce standards, ingest data, develop collections and products, maintain databases, ensure secure archival, provide user- and machine-accessible interfaces, assist users, migrate te... https://ceos-org.github.io/eo-glossary/terms/data_manager https://ceos-org.github.io/eo-glossary/terms/data_manager Wed, 01 Apr 2026 14:53:29 GMT A role responsible for the management and organization of data assets. https://ceos-org.github.io/eo-glossary/terms/data_maturity https://ceos-org.github.io/eo-glossary/terms/data_maturity Wed, 01 Apr 2026 14:53:29 GMT Beta https://ceos-org.github.io/eo-glossary/terms/data_migration https://ceos-org.github.io/eo-glossary/terms/data_migration Wed, 01 Apr 2026 14:53:29 GMT Transfer of data between storage types, formats, or systems with minimal change, often driven by acquisitions, relocation, or system scaling, and used to rethink data strategy and architecture. https://ceos-org.github.io/eo-glossary/terms/data_mining https://ceos-org.github.io/eo-glossary/terms/data_mining Wed, 01 Apr 2026 14:53:29 GMT An analytical process that attempts to find correlations or patterns in large data sets for the purpose of data or knowledge discovery. https://ceos-org.github.io/eo-glossary/terms/data_model https://ceos-org.github.io/eo-glossary/terms/data_model Wed, 01 Apr 2026 14:53:29 GMT An Earth science metadata model, which supports the data standardization necessary for total system interoperability within a heterogeneous, open systems environment. https://ceos-org.github.io/eo-glossary/terms/data_object https://ceos-org.github.io/eo-glossary/terms/data_object Wed, 01 Apr 2026 14:53:29 GMT An entity that, together with associated Representation Information, is the original target of preservation. https://ceos-org.github.io/eo-glossary/terms/data_operator https://ceos-org.github.io/eo-glossary/terms/data_operator Wed, 01 Apr 2026 14:53:29 GMT A person who operates a computer in a datacenter and performs such activities as commanding the operating system, mounting disks and tapes and placing paper in the printer. https://ceos-org.github.io/eo-glossary/terms/data_processing https://ceos-org.github.io/eo-glossary/terms/data_processing Wed, 01 Apr 2026 14:53:29 GMT Collective set of data actions including collection, retention, logging, generation, transformation, use, disclosure, sharing, transmission, and disposal. https://ceos-org.github.io/eo-glossary/terms/data_producer https://ceos-org.github.io/eo-glossary/terms/data_producer Wed, 01 Apr 2026 14:53:29 GMT Entity or organization that develops novel data products or improved algorithms, including system developers, operators, researchers, and data stewards responsible for data production or collection. https://ceos-org.github.io/eo-glossary/terms/data_provider https://ceos-org.github.io/eo-glossary/terms/data_provider Wed, 01 Apr 2026 14:53:29 GMT An entity that archives and distributes data. https://ceos-org.github.io/eo-glossary/terms/data_quality https://ceos-org.github.io/eo-glossary/terms/data_quality Wed, 01 Apr 2026 14:53:29 GMT Metric—such as a number, graph, uncertainty budget, or flag—that enables users to evaluate the fitness for purpose of data or derived products. https://ceos-org.github.io/eo-glossary/terms/data_record https://ceos-org.github.io/eo-glossary/terms/data_record Wed, 01 Apr 2026 14:53:29 GMT Data or information in a fixed form with consistent content, structure, and context; for Earth observation, it includes instrument data, browse data, ancillary and auxiliary data, calibration and v... https://ceos-org.github.io/eo-glossary/terms/data_science https://ceos-org.github.io/eo-glossary/terms/data_science Wed, 01 Apr 2026 14:53:29 GMT Multidisciplinary approach to extracting actionable insights from large datasets through data preparation, advanced analysis, and result visualization to inform stakeholder decisions. https://ceos-org.github.io/eo-glossary/terms/data_set https://ceos-org.github.io/eo-glossary/terms/data_set Wed, 01 Apr 2026 14:53:29 GMT Logically meaningful collection of similar or related data with shared characteristics—such as source, processing level, or resolution—grouped to meet specific coverage or revisit requirements. https://ceos-org.github.io/eo-glossary/terms/data_set_series https://ceos-org.github.io/eo-glossary/terms/data_set_series Wed, 01 Apr 2026 14:53:29 GMT Collection of data sets sharing the same product specification. https://ceos-org.github.io/eo-glossary/terms/data_stewards https://ceos-org.github.io/eo-glossary/terms/data_stewards Wed, 01 Apr 2026 14:53:29 GMT Individuals responsible for establishing, maintaining, and being accountable for the quality, integrity, documentation, and preservation of environmental data. https://ceos-org.github.io/eo-glossary/terms/cryosphere https://ceos-org.github.io/eo-glossary/terms/cryosphere Wed, 01 Apr 2026 14:53:29 GMT Masses of frozen water, such as sea ice, ice shields, glaciers, and snow. https://ceos-org.github.io/eo-glossary/terms/curation https://ceos-org.github.io/eo-glossary/terms/curation Wed, 01 Apr 2026 14:53:29 GMT Value-adding, organizational, presentational, and preservation activities to establish, increase, and sustain the value of Earth observation data over its lifecycle. https://ceos-org.github.io/eo-glossary/terms/custodian https://ceos-org.github.io/eo-glossary/terms/custodian Wed, 01 Apr 2026 14:53:29 GMT Entity responsible for the safe custody, transport, storage of the data and implementation of business rules. https://ceos-org.github.io/eo-glossary/terms/data https://ceos-org.github.io/eo-glossary/terms/data Wed, 01 Apr 2026 14:53:29 GMT Value and possibly Uncertainty of a Trait of a specific Entity. https://ceos-org.github.io/eo-glossary/terms/data_access https://ceos-org.github.io/eo-glossary/terms/data_access Wed, 01 Apr 2026 14:53:29 GMT Service to disseminate Data. https://ceos-org.github.io/eo-glossary/terms/data_acquisition https://ceos-org.github.io/eo-glossary/terms/data_acquisition Wed, 01 Apr 2026 14:53:29 GMT Includes all stages of the process of acquiring a data product or services, beginning with the process for determining the need for the product or service and ending with the final stage of data st... https://ceos-org.github.io/eo-glossary/terms/data_architect https://ceos-org.github.io/eo-glossary/terms/data_architect Wed, 01 Apr 2026 14:53:29 GMT Senior role responsible for translating business requirements into technology requirements and designing an organization’s enterprise data management framework, including standards, processes, and ... https://ceos-org.github.io/eo-glossary/terms/data_architecture https://ceos-org.github.io/eo-glossary/terms/data_architecture Wed, 01 Apr 2026 14:53:29 GMT Data architecture describes the structure of an organization's logical and physical data assets and data management resources. https://ceos-org.github.io/eo-glossary/terms/data_base https://ceos-org.github.io/eo-glossary/terms/data_base Wed, 01 Apr 2026 14:53:29 GMT (1) A collection of data sets associated with a system, project, or facility. https://ceos-org.github.io/eo-glossary/terms/data_catalog https://ceos-org.github.io/eo-glossary/terms/data_catalog Wed, 01 Apr 2026 14:53:29 GMT System for discovering Earth observation data products, organized into collections with access controls based on product and user type. https://ceos-org.github.io/eo-glossary/terms/data_catalog_service https://ceos-org.github.io/eo-glossary/terms/data_catalog_service Wed, 01 Apr 2026 14:53:29 GMT Process of exposing product or collection-level catalogs via standardized protocols such as OGC CSW. https://ceos-org.github.io/eo-glossary/terms/data_center https://ceos-org.github.io/eo-glossary/terms/data_center Wed, 01 Apr 2026 14:53:29 GMT Facility that stores, maintains, and provides access to datasets, including data selection, replication, documentation, and tailored product generation. https://ceos-org.github.io/eo-glossary/terms/data_colonialism https://ceos-org.github.io/eo-glossary/terms/data_colonialism Wed, 01 Apr 2026 14:53:29 GMT The process by which governments, non-governmental organizations and corporations claim ownership of and privatize the data that is produced by their users and citizens. https://ceos-org.github.io/eo-glossary/terms/data_compression https://ceos-org.github.io/eo-glossary/terms/data_compression Wed, 01 Apr 2026 14:53:29 GMT Reduction of file size via compression algorithms, rendering the file unreadable without decompression. https://ceos-org.github.io/eo-glossary/terms/data_cube https://ceos-org.github.io/eo-glossary/terms/data_cube Wed, 01 Apr 2026 14:53:29 GMT Multi-dimensional array of values representing data along axes such as space, time, or other measurable dimensions. https://ceos-org.github.io/eo-glossary/terms/data_curator https://ceos-org.github.io/eo-glossary/terms/data_curator Wed, 01 Apr 2026 14:53:29 GMT Role responsible for annotating, publishing, and managing data to ensure long-term value, availability, and reusability. https://ceos-org.github.io/eo-glossary/terms/data_democracy https://ceos-org.github.io/eo-glossary/terms/data_democracy Wed, 01 Apr 2026 14:53:29 GMT Describes a methodological framework of values and actions that benefit and minimize any harm to the public or the typical user. https://ceos-org.github.io/eo-glossary/terms/data_dictionary https://ceos-org.github.io/eo-glossary/terms/data_dictionary Wed, 01 Apr 2026 14:53:29 GMT A formal repository of terms used to describe data. https://ceos-org.github.io/eo-glossary/terms/data_distributor https://ceos-org.github.io/eo-glossary/terms/data_distributor Wed, 01 Apr 2026 14:53:29 GMT Entity that provides access to data for end users, ensuring accessibility and reliability across disciplinary boundaries. https://ceos-org.github.io/eo-glossary/terms/data_file https://ceos-org.github.io/eo-glossary/terms/data_file Wed, 01 Apr 2026 14:53:29 GMT A computer file that contains any type of data, including a word processing document or spreadsheet. https://ceos-org.github.io/eo-glossary/terms/data_format https://ceos-org.github.io/eo-glossary/terms/data_format Wed, 01 Apr 2026 14:53:29 GMT Structured Data that is machine readable and can be automatically read and processed by a computer, such as HDF, NetCDF, CSV, JSON, XML, etc. https://ceos-org.github.io/eo-glossary/terms/data_fusion https://ceos-org.github.io/eo-glossary/terms/data_fusion Wed, 01 Apr 2026 14:53:29 GMT Framework for combining data from multiple sources to produce higher-quality information, with quality defined by application context. https://ceos-org.github.io/eo-glossary/terms/data_governance https://ceos-org.github.io/eo-glossary/terms/data_governance Wed, 01 Apr 2026 14:53:29 GMT A set of processes that ensures that data assets are formally managed throughout the enterprise. https://ceos-org.github.io/eo-glossary/terms/data_integration https://ceos-org.github.io/eo-glossary/terms/data_integration Wed, 01 Apr 2026 14:53:29 GMT Process of making datasets from different sources compatible through consistent naming, units, and coordinates to enable combined use. https://ceos-org.github.io/eo-glossary/terms/climate_data_record https://ceos-org.github.io/eo-glossary/terms/climate_data_record Wed, 01 Apr 2026 14:53:29 GMT A time series of measurements of sufficientlength, consistency, and continuity to determineclimate variability and change. https://ceos-org.github.io/eo-glossary/terms/climate_indices https://ceos-org.github.io/eo-glossary/terms/climate_indices Wed, 01 Apr 2026 14:53:29 GMT Diagnostic time series representing the state of a climate system, derived from specific atmospheric or oceanic variables. https://ceos-org.github.io/eo-glossary/terms/climate_projection https://ceos-org.github.io/eo-glossary/terms/climate_projection Wed, 01 Apr 2026 14:53:29 GMT Simulated response of the climate system to a scenario of future emission or concentration of greenhouse gases (GHGs) and aerosols, generally derived using climate models. https://ceos-org.github.io/eo-glossary/terms/climatology https://ceos-org.github.io/eo-glossary/terms/climatology Wed, 01 Apr 2026 14:53:29 GMT Long-term average of a climate variable, typically over 20–30 years, computed for specified time ranges such as monthly or daily means. https://ceos-org.github.io/eo-glossary/terms/cloud_computing https://ceos-org.github.io/eo-glossary/terms/cloud_computing Wed, 01 Apr 2026 14:53:29 GMT Model for on-demand network access to a shared pool of configurable IT resources (e.g., networks, servers, storage, applications, and services) that can be rapidly provisioned and released with min... https://ceos-org.github.io/eo-glossary/terms/cloud_optimized_formats https://ceos-org.github.io/eo-glossary/terms/cloud_optimized_formats Wed, 01 Apr 2026 14:53:29 GMT The format of data that is ideal in a cloud infrastructure to make them tractable to support cloud-native analysis or access. https://ceos-org.github.io/eo-glossary/terms/collection https://ceos-org.github.io/eo-glossary/terms/collection Wed, 01 Apr 2026 14:53:29 GMT Group of products that have been processed using a consistent radiometric calibration, geometric registration base, data/metadata format, and version of processing algorithms. https://ceos-org.github.io/eo-glossary/terms/collection_group https://ceos-org.github.io/eo-glossary/terms/collection_group Wed, 01 Apr 2026 14:53:29 GMT Set of collections sharing a specific characteristic, e. https://ceos-org.github.io/eo-glossary/terms/collection_update https://ceos-org.github.io/eo-glossary/terms/collection_update Wed, 01 Apr 2026 14:53:29 GMT Minor revisions to a relatively small number of products within a collection for the purpose of correcting errors and maintaining consistent quality. https://ceos-org.github.io/eo-glossary/terms/collection_upgrade https://ceos-org.github.io/eo-glossary/terms/collection_upgrade Wed, 01 Apr 2026 14:53:29 GMT New and improved major version of all products within a collection due to comprehensive reprocessing. https://ceos-org.github.io/eo-glossary/terms/common_data_elements https://ceos-org.github.io/eo-glossary/terms/common_data_elements Wed, 01 Apr 2026 14:53:29 GMT The purpose of the CDE Project is to standardize the collection of investigational data to facilitate comparison of results across studies and more effectively aggregate information into significan... https://ceos-org.github.io/eo-glossary/terms/common_services https://ceos-org.github.io/eo-glossary/terms/common_services Wed, 01 Apr 2026 14:53:29 GMT The supporting services such as inter-process communication, name services, temporary storage allocation, exception handling, security, and directory services necessary to support the OAIS. https://ceos-org.github.io/eo-glossary/terms/compliance https://ceos-org.github.io/eo-glossary/terms/compliance Wed, 01 Apr 2026 14:53:29 GMT A state of being in accordance with established guidelines or specifications. https://ceos-org.github.io/eo-glossary/terms/confidence_interval https://ceos-org.github.io/eo-glossary/terms/confidence_interval Wed, 01 Apr 2026 14:53:29 GMT Probability that the Quantity lies in the interval, conditioned on the measuring or modelling assumptions. https://ceos-org.github.io/eo-glossary/terms/consistency https://ceos-org.github.io/eo-glossary/terms/consistency Wed, 01 Apr 2026 14:53:29 GMT ### Notes. https://ceos-org.github.io/eo-glossary/terms/consolidation https://ceos-org.github.io/eo-glossary/terms/consolidation Wed, 01 Apr 2026 14:53:29 GMT Consolidation is the process to provide a set of products for long-term archiving and further processing. https://ceos-org.github.io/eo-glossary/terms/consumer https://ceos-org.github.io/eo-glossary/terms/consumer Wed, 01 Apr 2026 14:53:29 GMT Role of persons or client systems that interact with OAIS services to find and access preserved information. https://ceos-org.github.io/eo-glossary/terms/content_information https://ceos-org.github.io/eo-glossary/terms/content_information Wed, 01 Apr 2026 14:53:29 GMT Information object comprising content data and representation information, serving as the primary target for preservation. https://ceos-org.github.io/eo-glossary/terms/context_information https://ceos-org.github.io/eo-glossary/terms/context_information Wed, 01 Apr 2026 14:53:29 GMT Information documenting the relationships of content information to its environment, including its creation purpose and connections to other content objects. https://ceos-org.github.io/eo-glossary/terms/continuity https://ceos-org.github.io/eo-glossary/terms/continuity Wed, 01 Apr 2026 14:53:29 GMT ### Notes. https://ceos-org.github.io/eo-glossary/terms/controlled_unclassified_information https://ceos-org.github.io/eo-glossary/terms/controlled_unclassified_information Wed, 01 Apr 2026 14:53:29 GMT Information requiring safeguarding or dissemination controls under law, regulation, or government policy, excluding classified national security information or atomic energy information. https://ceos-org.github.io/eo-glossary/terms/coordinate_reference_system https://ceos-org.github.io/eo-glossary/terms/coordinate_reference_system Wed, 01 Apr 2026 14:53:29 GMT Coordinate-based framework for defining and locating geographical entities locally, regionally, or globally. https://ceos-org.github.io/eo-glossary/terms/copernicus_service_provider https://ceos-org.github.io/eo-glossary/terms/copernicus_service_provider Wed, 01 Apr 2026 14:53:29 GMT Institutional body, organisation or programme that provides reliable, trusted (authoritative?) EO Information and that has the financial resources to sustain the provision. https://ceos-org.github.io/eo-glossary/terms/covariance_matrix https://ceos-org.github.io/eo-glossary/terms/covariance_matrix Wed, 01 Apr 2026 14:53:29 GMT Symmetric positive semi-definite matrix of dimension N × N associated with an estimate of a real vector quantity of dimension N × 1, containing on its diagonal the squares of the standard uncertain... https://ceos-org.github.io/eo-glossary/terms/coverage_interval https://ceos-org.github.io/eo-glossary/terms/coverage_interval Wed, 01 Apr 2026 14:53:29 GMT Range or specific subset of values associated with a coverage dataset. https://ceos-org.github.io/eo-glossary/terms/backup https://ceos-org.github.io/eo-glossary/terms/backup Wed, 01 Apr 2026 14:53:29 GMT General practice of making copies of current baseline and derived products of EO Collections at specified time intervals, and storing those copies in a manner that will not affect the data if the p... https://ceos-org.github.io/eo-glossary/terms/band_central_wavelength https://ceos-org.github.io/eo-glossary/terms/band_central_wavelength Wed, 01 Apr 2026 14:53:29 GMT Single wavelength Value within the sensitivity interval of a spectroradiometric Sensor which represents the respective band. https://ceos-org.github.io/eo-glossary/terms/baseline https://ceos-org.github.io/eo-glossary/terms/baseline Wed, 01 Apr 2026 14:53:29 GMT Reference Period, time or measure against which the Information is assessed or compared. https://ceos-org.github.io/eo-glossary/terms/bias https://ceos-org.github.io/eo-glossary/terms/bias Wed, 01 Apr 2026 14:53:29 GMT - measurement bias: estimate of a systematic measurement error https://ceos-org.github.io/eo-glossary/terms/bias_correction https://ceos-org.github.io/eo-glossary/terms/bias_correction Wed, 01 Apr 2026 14:53:29 GMT Reconciling differences between sensors and/or products by a simple multiplication or addition of a correction factor. https://ceos-org.github.io/eo-glossary/terms/big_data https://ceos-org.github.io/eo-glossary/terms/big_data Wed, 01 Apr 2026 14:53:29 GMT Data sets so large or complex that traditional data processing applications are inadequate. https://ceos-org.github.io/eo-glossary/terms/biosphere https://ceos-org.github.io/eo-glossary/terms/biosphere Wed, 01 Apr 2026 14:53:29 GMT Masses of living organisms, such as vegetation and animals, including dead but still connected parts such as roots, trunks or branches. https://ceos-org.github.io/eo-glossary/terms/browse https://ceos-org.github.io/eo-glossary/terms/browse Wed, 01 Apr 2026 14:53:29 GMT Process of viewing browse data or images to quickly assess them before accessing full-resolution or broader spatio-temporal data. https://ceos-org.github.io/eo-glossary/terms/browse_data https://ceos-org.github.io/eo-glossary/terms/browse_data Wed, 01 Apr 2026 14:53:29 GMT Subsets of data sets, other than directory and metadata, that facilitate user selection of specific data by providing reduced-resolution or simplified representations. https://ceos-org.github.io/eo-glossary/terms/browse_image https://ceos-org.github.io/eo-glossary/terms/browse_image Wed, 01 Apr 2026 14:53:29 GMT Visual representation of a product (as an image) to help and support product selection in the frameof the user service facility. https://ceos-org.github.io/eo-glossary/terms/building_block https://ceos-org.github.io/eo-glossary/terms/building_block Wed, 01 Apr 2026 14:53:29 GMT Set of functions with a well-defined external interface allowing reuse for different missions. https://ceos-org.github.io/eo-glossary/terms/bulk_data_transfer https://ceos-org.github.io/eo-glossary/terms/bulk_data_transfer Wed, 01 Apr 2026 14:53:29 GMT A software-based mechanism that is designed to move large data files. https://ceos-org.github.io/eo-glossary/terms/bulk_dissemination https://ceos-org.github.io/eo-glossary/terms/bulk_dissemination Wed, 01 Apr 2026 14:53:29 GMT Bulk Dissemination is a special service provided in case of high volumes of data to be disseminated to User (Research on-demand or Operational). https://ceos-org.github.io/eo-glossary/terms/bulk_order https://ceos-org.github.io/eo-glossary/terms/bulk_order Wed, 01 Apr 2026 14:53:29 GMT An order request for data from tape or disk cache which spans a month or more. https://ceos-org.github.io/eo-glossary/terms/business_continuity https://ceos-org.github.io/eo-glossary/terms/business_continuity Wed, 01 Apr 2026 14:53:29 GMT An organisation's readiness to continue functioning during times of disruption. https://ceos-org.github.io/eo-glossary/terms/calibration https://ceos-org.github.io/eo-glossary/terms/calibration Wed, 01 Apr 2026 14:53:29 GMT Process of quantitatively defining a system's response to known, controlled inputs using reference measurements. https://ceos-org.github.io/eo-glossary/terms/calibration_data https://ceos-org.github.io/eo-glossary/terms/calibration_data Wed, 01 Apr 2026 14:53:29 GMT Data required to calibrate instrument science data, engineering data, and spacecraft data, including pre-flight and in-flight measurements, calibration coefficients, and ground truth. https://ceos-org.github.io/eo-glossary/terms/cartographic_projection https://ceos-org.github.io/eo-glossary/terms/cartographic_projection Wed, 01 Apr 2026 14:53:29 GMT ### Notes. https://ceos-org.github.io/eo-glossary/terms/catalogue https://ceos-org.github.io/eo-glossary/terms/catalogue Wed, 01 Apr 2026 14:53:29 GMT System that provides discovery of information on which Earth observation products can be obtained. https://ceos-org.github.io/eo-glossary/terms/catalogue_service https://ceos-org.github.io/eo-glossary/terms/catalogue_service Wed, 01 Apr 2026 14:53:29 GMT Functionality to expose or publish product-level catalogues using protocols such as the Open Geospatial Consortium's Catalogue Service for Web (CSW). https://ceos-org.github.io/eo-glossary/terms/cell https://ceos-org.github.io/eo-glossary/terms/cell Wed, 01 Apr 2026 14:53:29 GMT Spatial, spatio-temporal zone or temporal unit of geometry with dimensionality greater than 0, associated with a zone. https://ceos-org.github.io/eo-glossary/terms/certification_services https://ceos-org.github.io/eo-glossary/terms/certification_services Wed, 01 Apr 2026 14:53:29 GMT A NCEI director certification of archive authenticity. https://ceos-org.github.io/eo-glossary/terms/characteristic https://ceos-org.github.io/eo-glossary/terms/characteristic Wed, 01 Apr 2026 14:53:29 GMT Distinguishing Feature. https://ceos-org.github.io/eo-glossary/terms/circulation https://ceos-org.github.io/eo-glossary/terms/circulation Wed, 01 Apr 2026 14:53:29 GMT PDGS function implementing the distribution of products between facilities in the same or different geographic locations. https://ceos-org.github.io/eo-glossary/terms/citizen_data_scientist https://ceos-org.github.io/eo-glossary/terms/citizen_data_scientist Wed, 01 Apr 2026 14:53:29 GMT A person who creates or generates models that leverage predictive or prescriptive analytics, but whose primary job function is outside of the field of statistics and analytics. https://ceos-org.github.io/eo-glossary/terms/classification_system https://ceos-org.github.io/eo-glossary/terms/classification_system Wed, 01 Apr 2026 14:53:29 GMT Nomenclature used to classify Information into categorical thematic classes (e.g., EUNIS, MAES ecosystems, Corine Land Cover, LCCS). https://ceos-org.github.io/eo-glossary/terms/classification_system_levels https://ceos-org.github.io/eo-glossary/terms/classification_system_levels Wed, 01 Apr 2026 14:53:29 GMT Levels in a hierarchical Classification System. https://ceos-org.github.io/eo-glossary/terms/access https://ceos-org.github.io/eo-glossary/terms/access Wed, 01 Apr 2026 14:53:29 GMT Services or systems enabling data search, discovery, retrieval, and dissemination; may refer to functionality, service providers, or entities providing access. https://ceos-org.github.io/eo-glossary/terms/access_collection https://ceos-org.github.io/eo-glossary/terms/access_collection Wed, 01 Apr 2026 14:53:29 GMT A collection of AIPs that is defined by a Collection Description but for which there is no Packaging Information for the collection in Archival Storage. https://ceos-org.github.io/eo-glossary/terms/access_functional_entity https://ceos-org.github.io/eo-glossary/terms/access_functional_entity Wed, 01 Apr 2026 14:53:29 GMT OAIS functional entity that makes archival information holdings and related services visible to consumers. https://ceos-org.github.io/eo-glossary/terms/access_rights_information https://ceos-org.github.io/eo-glossary/terms/access_rights_information Wed, 01 Apr 2026 14:53:29 GMT Information specifying access restrictions on content, including legal terms, licensing, access control, and rights enforcement specifications as defined in submission agreements. https://ceos-org.github.io/eo-glossary/terms/access_software https://ceos-org.github.io/eo-glossary/terms/access_software Wed, 01 Apr 2026 14:53:29 GMT OAIS functional entity that makes archival information holdings and related services visible to consumers. https://ceos-org.github.io/eo-glossary/terms/accessibility https://ceos-org.github.io/eo-glossary/terms/accessibility Wed, 01 Apr 2026 14:53:29 GMT The capability to access available data. https://ceos-org.github.io/eo-glossary/terms/accuracy https://ceos-org.github.io/eo-glossary/terms/accuracy Wed, 01 Apr 2026 14:53:29 GMT Closeness of agreement between a measured quantity value and a true quantity value of a measurand. https://ceos-org.github.io/eo-glossary/terms/acquisition https://ceos-org.github.io/eo-glossary/terms/acquisition Wed, 01 Apr 2026 14:53:29 GMT Process from on-board recording and downlink to ground reconstruction of instrument source packets. https://ceos-org.github.io/eo-glossary/terms/acquisition_planning https://ceos-org.github.io/eo-glossary/terms/acquisition_planning Wed, 01 Apr 2026 14:53:29 GMT Computation of a non-conflicting timeline for space segment and station reception activities, accounting for budgets, capacities, station availability, and cross-mission conflict resolution. https://ceos-org.github.io/eo-glossary/terms/ad_hoc_order https://ceos-org.github.io/eo-glossary/terms/ad_hoc_order Wed, 01 Apr 2026 14:53:29 GMT A request that is generated by a Consumer for information the OAIS has indicated is currently available. https://ceos-org.github.io/eo-glossary/terms/administration_functional_entity https://ceos-org.github.io/eo-glossary/terms/administration_functional_entity Wed, 01 Apr 2026 14:53:29 GMT OAIS functional entity that controls day-to-day operation of other OAIS functional entities. https://ceos-org.github.io/eo-glossary/terms/administrative_data https://ceos-org.github.io/eo-glossary/terms/administrative_data Wed, 01 Apr 2026 14:53:29 GMT Data collected and maintained by agencies are used to administer (or run) programs and provide services to the public. https://ceos-org.github.io/eo-glossary/terms/aggregation https://ceos-org.github.io/eo-glossary/terms/aggregation Wed, 01 Apr 2026 14:53:29 GMT The presentation of many data files as one consistent block of time and space. https://ceos-org.github.io/eo-glossary/terms/algorithm https://ceos-org.github.io/eo-glossary/terms/algorithm Wed, 01 Apr 2026 14:53:29 GMT Series of steps or rules for solving a problem or performing a task, especially by a computer. https://ceos-org.github.io/eo-glossary/terms/algorithm_theoretical_basis_document https://ceos-org.github.io/eo-glossary/terms/algorithm_theoretical_basis_document Wed, 01 Apr 2026 14:53:29 GMT Document detailing the theoretical foundation of an algorithm, including physical theory, mathematical procedures, and assumptions, updated with algorithm changes. https://ceos-org.github.io/eo-glossary/terms/analysis https://ceos-org.github.io/eo-glossary/terms/analysis Wed, 01 Apr 2026 14:53:29 GMT Verification method using analytical techniques to demonstrate theoretical compliance with requirements through review, modeling, simulation, calculations, or data comparisons. https://ceos-org.github.io/eo-glossary/terms/analysis_ready_data https://ceos-org.github.io/eo-glossary/terms/analysis_ready_data Wed, 01 Apr 2026 14:53:29 GMT Processed data product geometrically referenced and minimally corrected to enable direct use without additional user processing. https://ceos-org.github.io/eo-glossary/terms/analytics https://ceos-org.github.io/eo-glossary/terms/analytics Wed, 01 Apr 2026 14:53:29 GMT Systematic computational analysis of data or statistics to discover, interpret, and communicate meaningful patterns for decision-making. https://ceos-org.github.io/eo-glossary/terms/analytics_optimized_data_store https://ceos-org.github.io/eo-glossary/terms/analytics_optimized_data_store Wed, 01 Apr 2026 14:53:29 GMT Data stores offer reliable and flexible storage for processed data and make it available for queries and analysis on a large scale. https://ceos-org.github.io/eo-glossary/terms/ancillary_data https://ceos-org.github.io/eo-glossary/terms/ancillary_data Wed, 01 Apr 2026 14:53:29 GMT Data acquired on the same platform as the main sensor but not from the sensor itself, used primarily for processing instrument data. https://ceos-org.github.io/eo-glossary/terms/anthroposphere https://ceos-org.github.io/eo-glossary/terms/anthroposphere Wed, 01 Apr 2026 14:53:29 GMT One of the Earth spheres consisting predominantly of matter processed by humans, such as construction wood, bricks, concrete, asphalt, glass, or plastics. https://ceos-org.github.io/eo-glossary/terms/application https://ceos-org.github.io/eo-glossary/terms/application Wed, 01 Apr 2026 14:53:29 GMT Computer program designed for specific end-user tasks, distinct from system or utility software. https://ceos-org.github.io/eo-glossary/terms/application_programming_interface https://ceos-org.github.io/eo-glossary/terms/application_programming_interface Wed, 01 Apr 2026 14:53:29 GMT According to Wikipedia, \"In computer programming, an application programming interface (API) is a set of routines, protocols, and tools for building software and applications. https://ceos-org.github.io/eo-glossary/terms/appraisal https://ceos-org.github.io/eo-glossary/terms/appraisal Wed, 01 Apr 2026 14:53:29 GMT Procedure for assessing the value and suitability of Earth observation space data sets for long-term preservation. https://ceos-org.github.io/eo-glossary/terms/archival_information_package https://ceos-org.github.io/eo-glossary/terms/archival_information_package Wed, 01 Apr 2026 14:53:29 GMT Information package containing content and preservation description information preserved within an OAIS. https://ceos-org.github.io/eo-glossary/terms/archive https://ceos-org.github.io/eo-glossary/terms/archive Wed, 01 Apr 2026 14:53:29 GMT System for long-term storage of data products with guaranteed preservation. https://ceos-org.github.io/eo-glossary/terms/archive_operations https://ceos-org.github.io/eo-glossary/terms/archive_operations Wed, 01 Apr 2026 14:53:29 GMT Functional entity managing day-to-day operations of an archive system, including hardware, software, monitoring, error recovery, maintenance, and reporting. https://ceos-org.github.io/eo-glossary/terms/archive_organization https://ceos-org.github.io/eo-glossary/terms/archive_organization Wed, 01 Apr 2026 14:53:29 GMT The organizational structure of an archive based on a sufficient number of qualified staffs with clear roles and responsibilities. https://ceos-org.github.io/eo-glossary/terms/archive_recommendation_package https://ceos-org.github.io/eo-glossary/terms/archive_recommendation_package Wed, 01 Apr 2026 14:53:29 GMT An ARP is written in collaboration with the Data Producers early on in the process, in which recommendations are assembled for what exactly should be archived. https://ceos-org.github.io/eo-glossary/terms/archivist https://ceos-org.github.io/eo-glossary/terms/archivist Wed, 01 Apr 2026 14:53:29 GMT Professional trained in preserving original materials and facilitating access, with expertise across the records life cycle and strong research skills. https://ceos-org.github.io/eo-glossary/terms/area_of_interest https://ceos-org.github.io/eo-glossary/terms/area_of_interest Wed, 01 Apr 2026 14:53:29 GMT Zone in 2D or 3D for which the Information or Data is requested. https://ceos-org.github.io/eo-glossary/terms/area_of_representativeness https://ceos-org.github.io/eo-glossary/terms/area_of_representativeness Wed, 01 Apr 2026 14:53:29 GMT Area (or volume) where concentration does not deviate from the station value by more than a specified range. https://ceos-org.github.io/eo-glossary/terms/artifact https://ceos-org.github.io/eo-glossary/terms/artifact Wed, 01 Apr 2026 14:53:29 GMT - A physical object that is made or modified by human culture https://ceos-org.github.io/eo-glossary/terms/artificial_intelligence https://ceos-org.github.io/eo-glossary/terms/artificial_intelligence Wed, 01 Apr 2026 14:53:29 GMT The ability of a digital computer or computer-controlled robot to perform tasks commonly associated with intelligent beings. https://ceos-org.github.io/eo-glossary/terms/associated_knowledge https://ceos-org.github.io/eo-glossary/terms/associated_knowledge Wed, 01 Apr 2026 14:53:29 GMT All information and tools relevant to instrument data that ensure its usability, legibility, and understandability. https://ceos-org.github.io/eo-glossary/terms/atmosphere https://ceos-org.github.io/eo-glossary/terms/atmosphere Wed, 01 Apr 2026 14:53:29 GMT Layer of gases, commonly known as air, including suspended liquid and solid particles known as aerosols (incl. https://ceos-org.github.io/eo-glossary/terms/attitude_data https://ceos-org.github.io/eo-glossary/terms/attitude_data Wed, 01 Apr 2026 14:53:29 GMT Data representing spacecraft orientation, pointing, calibration, alignment, Euler angles, quaternions, rates, biases, and associated accuracy parameters. https://ceos-org.github.io/eo-glossary/terms/authenticity https://ceos-org.github.io/eo-glossary/terms/authenticity Wed, 01 Apr 2026 14:53:29 GMT The degree to which a person (or system) regards an object as what it is purported to be. https://ceos-org.github.io/eo-glossary/terms/authoritative_copy https://ceos-org.github.io/eo-glossary/terms/authoritative_copy Wed, 01 Apr 2026 14:53:29 GMT Recognized as the official copy of the object from the originating source that has not been altered. https://ceos-org.github.io/eo-glossary/terms/authoritative_source https://ceos-org.github.io/eo-glossary/terms/authoritative_source Wed, 01 Apr 2026 14:53:29 GMT Entity with verified access to accurate information from an issuing source to validate identity evidence during proofing. https://ceos-org.github.io/eo-glossary/terms/authorization_of_use https://ceos-org.github.io/eo-glossary/terms/authorization_of_use Wed, 01 Apr 2026 14:53:29 GMT Official management decision to authorize use of an information system based on an authorization package and accepted risk to operations, assets, and reputation. https://ceos-org.github.io/eo-glossary/terms/auxiliary_data https://ceos-org.github.io/eo-glossary/terms/auxiliary_data Wed, 01 Apr 2026 14:53:29 GMT Data enhancing processing and utilization of main sensor data, collected via different processes or platforms, and usable as independent datasets. https://ceos-org.github.io/eo-glossary/terms/availability https://ceos-org.github.io/eo-glossary/terms/availability Wed, 01 Apr 2026 14:53:29 GMT The quality of being at hand when needed.