FIDUCEO Vocabulary

This is the FIDUCEO draft vocabulary. We encourage comments on our definitions, please click on any word to comment.

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LAC

Local Area Coverage

Level 0

(CEOS definition)

Reconstructed unprocessed instrument data at full space and time resolution with all available supplemental information to be used in subsequent processing (e.g., ephemeris, health and safety) appended.

Level 1A

(CEOS definition)
Reconstructed, unprocessed instrument data at full resolution, time-referenced, and annotated with ancillary information, including radiometric and geometric calibration coefficients and georeferencing parameters (e.g., platform ephemeris) computed and appended but not applied to Level 0 data.

Level 1B (FCDR)

Level 1A data that have been processed to sensor units and contains acquisition time and satellite pixel location with associated uncertainties. (Note this is the satellite raw grid). Data processing is performed in a consistent manner for the entire data set.

Level 1C (FCDR)

Level 1B data that have been georeferenced in a standard georeferenced grid.

Level 2 (CDR)

Derived geophysical variables at the same resolution and location as Level 1 source data.

Level 3 (CDR)

Variables mapped on uniform space-time grid scales, usually with some completeness and consistency.

Locally systematic or locally correlated

A particular case of structured random, where measured values obtained together (having small separations in time and space) have highly correlated, similar magnitude errors, whereas errors in measurements separated by longer space-time scales are independent and uncorrelated.