VNP03IMG - VIIRS/NPP Imagery Resolution Terrain-Corrected Geolocation 6-Min L1 Swath 375m



VNP03IMG represents the short-name for the Suomi National Polar-orbiting Partnership (SNPP) platform-based NASA VIIRS L1 terrain-corrected geolocation product and contains the derived line-of- sight (LOS) vectors for each of the 375-m image-resolution or I-bands. The geolocation algorithm uses a number of 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 L1 pixel. The VNP03IMG 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. VNP03IMG provides a fundamental input to derive a number of VIIRS I-band higher- level products.

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Shortname: VNP03IMG
Platform: Suomi-NPP
Instrument: VIIRS
Processing Level: Level-1B
Data Format: netCDF4/HDF5
Spatial Resolution: 375 m
Temporal Resolution: 6 minute
ArchiveSets: 5200, 5110
Collection: NPP and JPSS1 VIIRS data 2.0 (ArchiveSet 5200)
PGE Number: PGE501
File Naming Convention:

Syntax: ESDT.AYYYYDDD.HHMM.CCC.YYYYDDDHHMMSS.Format
Example: VNP03IMG.A2015080.0800.002.2021080083706.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: SNPP VIIRS, L1, I-bands, Terrain-corrected Geolocation
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