Ancillary Data
1 Definition
Data acquired on the same platform as the main sensor but not from the sensor itself, used primarily for processing instrument data.
Notes
This can be divided into data referred to as spacecraft 'engineering', 'core housekeeping' or 'subsystem' data obtained from other parts of the platform, and includes parameters such as orbit position and velocity, attitude and its range of change, time, temperatures, pressures, jet firings, water dumps, internally produced magnetic fields, and other environmental measurements. Ancillary refers to data that exist purely to serve the data processing.
Examples
Sources
- ESA/CEOS?, modified
- EO Data Stewardship Glossary
2 Definition
Non-instrument data required for processing, including orbit, attitude, time, spacecraft engineering, calibration, quality, and external model data.
Notes
Examples
Sources
- CEOS-ARD PFS template 20220302
3 Definition
Data not from the sensor, provided in science telemetry, used to process instrument data and including spacecraft engineering, housekeeping, or subsystem parameters.
Notes
OASIS equivalent definition is ancillary data can be considered as a Digital Data Object (object composed of a set of bit sequences) part of a Content Information, related to other digital objects (i.e. Primary Data) through Context Information (the information that documents the relationships of the Content Information to its environment; this includes why the Content Information was created and how it relates to other Content Information objects) or as a compound digital object which contains a mixture of Provenance, Context and Representation Information related to a Primary Digital Data Object
Examples
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Term Relationships