NASA Data Processing Levels
Tags :: Remote Sensing
| Data Level | Description |
|---|---|
| Level 0 | Reconstructed, unprocessed instrument and payload data at full resolution, with any and all communications artifacts (e.g., synchronization frames, communications headers, duplicate data) removed. |
| Level 1A | Level 1A (L1A) data are reconstructed, unprocessed instrument data at full resolution, time-referenced, and annotated with ancillary information. This ancillary information can include radiometric and geometric calibration coefficients and georeferencing parameters (e.g., platform ephemeris). |
| Level 1B | L1B data are L1A data that have been processed to instrument units (not all instruments have L1B source data). |
| Level 1C | L1C data are L1B data that include new variables to describe the spectra. These variables allow the user to identify which L1C channels have been copied directly from the L1B and which have been synthesized from L1B and why. |
| Level 2 | Derived geophysical variables at the same resolution and location as L1 source data. |
| Level 2A | L2A data contains information derived from the geolocated instrument data, such as ground elevation, highest and lowest surface return elevations, energy quantile heights (“relative height” metrics), and other waveform-derived metrics describing the intercepted surface. |
| Level 2B | L2B data are L2A data that have been processed to instrument units (not all instruments will have a L2B equivalent). |
| Level 3 | Variables mapped on uniform space-time grid scales, usually with some completeness and consistency. |
| Level 3A | L3A data are generally periodic summaries (weekly, 10-day, monthly) of L2 products. |
| Level 4 | Model output or results from analyses of lower-level data (e.g., variables derived from multiple measurements). |