VJ103MOD - VIIRS/JPSS1 Moderate Resolution Terrain-Corrected Geolocation 6-Min L1 Swath 750m



VJ103MOD is the short-name for the NOAA-20 — formerly called Joint Polar-orbiting Satellite System-1 (JPSS-1) — platform-based NASA VIIRS Level-1 terrain-corrected geolocation product and contains the derived line-of-sight (LOS) vectors for each of the 750 m moderate-resolution, or M-bands. The geolocation algorithm uses several inputs that include an Earth ellipsoid, geoid, and a digital terrain model along with the SNPP platform’s ephemeris and attitude data, and knowledge of the VIIRS sensor and satellite geometry. It produces geodetic coordinates (latitude and longitude), and related parameters for each VIIRS Level-1 pixel. The VJ103MOD product includes geodetic latitude, longitude, surface height above the geoid, solar zenith and azimuth angles, sensor zenith and azimuth angles, land/water mask, and quality flag for every pixel location. VJ103MOD provides a fundamental input to derive several VIIRS M-band higher-level products.

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Shortname: VJ103MOD
Platform: JPSS-1
Instrument: VIIRS
Processing Level: Level-1A
Data Format: netCDF4/HDF5
Spatial Resolution: 750 m
Temporal Resolution: 6 minute
ArchiveSets: 5201
Collection: NPP and JPSS1 VIIRS data 2.1 (ArchiveSet 5201)
PGE Number: PGE501
File Naming Convention:

Syntax: ESDT.AYYYYDDD.HHMM.CCC.YYYYDDDHHMMSS.Format
Example: VJ103MOD.A2018008.0130.021.2021085005906.nc

  • ESDT Earth Science Data Type or Shortname
  • A Stands for Acquisition
  • YYYYDDD Data acquisition year and Day-of-year per the Julian Calendar
  • HHMM Acquisition Hour and Minute
  • CCC Version ID of the data collection
  • YYYYDDDHHMMSS Processing year, Day-of-year, UTC time (hour, minutes, seconds)
  • Format File format suffix, which in the above case represents netCDF4/HDF5
Keywords: JPSS-1 VIIRS, L1, M-bands, Terrain-corrected Geolocation, NOAA-20 VIIRS
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