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Collection 2 S-NPP Product Descriptions: VNP03DNB_NRT

Last update: January 29, 2022

Data Set Short Name:
VNP03DNB_NRT

Data Set Long Name:
VIIRS/NPP Day/Night Band Terrain Corrected Geolocation L1 6-Min Swath 750m NRT

Platform:
Suomi National Polar-Orbiting Partnership (S-NPP)

Instrument:
Visible-Infrared Imaging-Radiometer Suite (VIIRS)

Product Description:
The VNP03DNB_NRT,a Near Real Time (NRT) product, includes the geolocation fields that are calculated for VIIRS day-night band (DNB) Line of sight (LOS) for all orbits at the nominal resolution of 750 m. The locations and ancillary information correspond to the intersection of the centers of each Field of View (FOV) from 16 detectors in the DNB 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 VNP03DNB Geolocation files include geodetic latitude, longitude, surface height above the geoid, solar and lunar zenith and azimuth angles, lunar phase angle and illumination fraction, satellite zenith and azimuth angles, and a land/water mask for each 750m 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 subsequent VIIRS day/night band products, particularly those produced by the Land team.

file_naming_convention = VNP03DNB_NRT.AYYYYDDD.HHMM.CCC.nc

AYYYYDDD = Acquisition Year and Day of Year
HHMM = Hour and minute of acquisition
CCC = Collection number
nc = NetCDF4

Production Frequency:
240 files per day

Spatial Coverage:
Global

Spatial Resolution:
750m at nadir

File Size (MB):
~120

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

Author (PI), et al., 2022. 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:
https://doi.org/10.5067/VIIRS/VNP03DNB_NRT.002