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Collection 1 S-NPP Product Descriptions: VNP03IMG_NRT

Last update: June 29, 2017

Data Set Short Name:

Data Set Long Name:
VIIRS/NPP Imagery Resolution Terrain-Corrected Geolocation L1 6-Min Swath 375m NRT

Suomi National Polar-Orbiting Partnership (S-NPP)

Visible-Infrared Imaging-Radiometer Suite (VIIRS)

Product Description:
The VNP03IMG, a Near Real Time (NRT) product, includes the geolocation fields that are calculated for each VIIRS imagery resolution band (I-band) Line of sight (LOS) for all orbits at the nominal resolution of 375 m. The locations and ancillary information correspond to the intersection of the centers of each Field of View (FOV) from 32 detectors in an ideal I-band on the Earth's surface. A digital terrain model is used to model the Earth's surface. The main inputs are the spacecraft attitude and orbit ephemeris data, the instrument telemetry and the digital elevation model. The geolocation fields contained within the VNP03IMG Geolocation files include geodetic latitude, longitude, surface height above the geoid, solar zenith and azimuth angles, satellite zenith and azimuth angles, and a land/water mask for each 375m sample. Additional information is included in the header to enable the calculation of the approximate location of the center of the detectors for any of the VIIRS bands. This product is used as input by a large number of subsequent VIIRS Imagery Resolution products, particularly those produced by the Land team.

file_naming_convention =

  • AYYYYDDD = Acquisition Year and Day of Year
  • HHMM = Hour and minute of acquisition
  • CCC = Collection number
  • nc = NetCDF5

Production Frequency:
240 files per day

Spatial Coverage:

Spatial Resolution:
375m at nadir

File Size (MB):

Related Links:

We request that you kindly cite the use of this data set in a publication using the following citation.

Author (PI), et al., 2016. Product name as given on atmo web site. NASA MODIS Adaptive Processing System, Goddard Space Flight Center, USA: [link as given on atmo site].

For example:
Wolfe, R. E., G. Lin, M. Nishihama, K. P. Tewari, J. C. Tilton, and A. R. Isaacman (2013), “Suomi NPP VIIRS prelaunch and on-orbit geometric calibration and characterization”, JOURNAL OF GEOPHYSICAL RESEARCH: ATMOSPHERES, VOL. 118, 11,508–11,521, doi:10.1002/jgrd.50873.

Data Authors:
Gary Lin/Robert Wolfe

Dataset Originator/Creator:
VIIRS Calibration Support Team (VCST)/ MODIS Adaptive Processing System (MODAPS)

Dataset DOI:

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