Definition

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. It includes data taken on the ground, on the ocean or in the atmosphere. Ground truth data is another measurement of the phenomenon of interest; it is not necessarily more "true" or more accurate than the instrument data.

Source

 CEOS/WGISS/DSIG/GLOS

CEOS-WGISS Document: Auxiliary Data in the CEOS Community: Reference Guidelines Document Part 1: Current Usage (1996) accessible at wgiss.ceos.org/archive/archive.doc/ads200part1.doc

Category

3. Observation properties words