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Collection 1 S-NPP Product Descriptions: VNP02DNB_NRT

Last update: June 30, 2017

Data Set Short Name:
VNP02DNB_NRT

Data Set Long Name:
VIIRS/NPP Day/Night Band 6-Min L1B Swath SDR 750m NRT

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

Instrument:
VIIRS

Product Description:
The VIIRS Level 1 and Level 2 swath products are generated from the processing of 6 minutes of VIIRS data acquired during the S-NPP satellite overpass. The Day/Night band (DNB) is a panchromatic channel covering the wavelengths from 500 nm to 900 nm, and sensitive to visible and near-infrared from daylight down to the low-level radiation observed at night.

The VIIRS DNB is much improved from previous products due in large part to its complicated continuous on-board calibration. In addition, new-moon Earth observations are used to estimate and remove stray light. These corrections are a first of its kind to provide on-orbit radiometric calibration. The corrections made to the DNB data are provided by the NASA VIIRS Characterization Support Team and are likely to continue to evolve given this new methodology.

The spatial resolution of the instrument at viewing nadir is approximately 750 m for the DNB and the Moderate-resolution Bands and and 375m for the Imagery bands. The DNB is aggregated to maintain nearly constant horizontal spatial resolution across the swath.

As the DNB is sensitive to nighttime radiation over the full lunar cycle, the incoming solar and lunar radiation must be properly modeled to calculate the reflectance. However, the DNB is sensitive to more sources of radiation than just the sun and moon.

file_naming_convention = VNP02DNB_NRT.AYYYYDDD.HHMM.CCC.nc

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

Production Frequency:
240 files per day

Spatial Coverage:
Global

Spatial Resolution:
750m at nadir

File Size (MB):
~40

Related Links:
http://viirsland.gsfc.nasa.gov/index.html.

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

Author (PI), et al., 2016. Product name as given on web site. NASA MODIS Adaptive Processing System, Goddard Space Flight Center, USA: [link as given on product 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, J. Geophys. Res. Atmos., 118, 11508–11521, doi:10.1002/jgrd.50873.

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

Dataset DOI:
http://dx.doi.org/10.5067/VIIRS/VNP02DNB_NRT.001


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