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Description
The VIIRS/JPSS2 Imagery Resolution Terrain Corrected Geolocation 6-Min L1 Swath 375m dataset provides corrected geodetic coordinates and associated parameters for each pixel from the NOAA-21 satellite's VIIRS instrument. Its algorithm uses Earth models, digital terrain, and satellite ephemeris to produce latitude, longitude, surface height, solar and sensor angles, a land/water mask, and a quality flag. This product serves as a fundamental input for generating higher-level VIIRS imagery products.
Use Cases
Precise georeferencing of VIIRS imagery bands based on corrected latitude and longitude coordinates.
Calculating solar illumination conditions for scenes using solar zenith and azimuth angles.
Masking land or water pixels for analysis using the included land/water mask.
Assessing data quality for downstream processing via the pixel-level quality flag.
Correcting sensor view geometry effects in imagery using sensor zenith and azimuth angles.
Strengths
Product includes on-orbit validation with cited error corrections: ~350 m along-scan and ~165 m along-track for image bands.
Contains multiple derived geolocation parameters per pixel, including surface height and viewing angles.
Serves as a foundational, cross-platform dataset available on NASA's LAADS and Data.gov.
Limitations
Key metadata such as row count, file size, and specific column definitions are not provided in the available sources.
License is listed as 'other-license-specified' without further detail.
The 'last updated' date of 2026-04-09 appears to be a future date, which may indicate a metadata error.
Provenance
Source
National Aeronautics and Space Administration (NASA), derived from the Joint Polar-orbiting Satellite System-2 (JPSS-2/NOAA-21) platform.
Collection Method
Generated by a geolocation algorithm using Earth ellipsoid, geoid, digital terrain model, satellite ephemeris, attitude data, and sensor geometry.
Freshness
2026-04-09 21:01:38.157789
Geography
Global coverage from the satellite's polar orbit.
License details require checking the specified LAADS product page. Data files are in specialized formats (BIN, ISO).