Collection 2 JPSS2 Product Descriptions: VJ202IMG

Last update: January 16, 2024

Data Set Short Name:
VJ202IMG_NRT

Data Set Long Name:
VIIRS/JPSS2 Imagery Resolution 6-Min L1B Swath 375m NRT

Platform:
Joint Polar Satellite System-2 (JPSS-2/NOAA-21)

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

Product Description:
The VIIRS/JPSS2 Imagery Resolution 6-Min L1B Swath 375m Near Real Time (NRT), short-name VJ202IMG_NRT is platform-derived NASA VIIRS L1B calibrated radiances product that comprises five image-resolution or I-bands, which have a 375-meter resolution at nadir. These I-bands comprise three reflective solar bands (RSB) and two thermal emissive bands (TEB). Each of the I-bands has 32 detectors in the along-track direction with 32 rows of pixels per scan that offer a resolution that is twice finer than that of the moderate (M) and Day-Night bands (DNB). Ranging in wavelengths from 0.6 µm to 12.4 µm, the I-bands are sensitive to visible/reflective, near-, shortwave-, mediumwave-, and longwave-infrared wavelengths. Derived from the NASA VIIRS L1A raw radiances, this product includes calibrated and geolocated radiance and reflectance data, quality flags, and granule- and collection-level metadata. In contrast to a MODIS L1B product, which temporally spans 5 minutes, the VIIRS L1B calibrated radiances product contains a nominal temporal duration of 6 minutes. The image dimensions of the 375-m swath product measure 6464 lines by 6400 pixels.

The J2 VIIRS radiometric calibration Level-1B reprocessing includes a few calibration updates for the reflective solar bands (RSB), but no significant changes for the day-night band (DNB) or thermal emissive bands (TEB).

file_naming_convention = "VJ202IMG_NRT.AYYYYDDD.HHMM.CCC.nc

• AYYYYDDD = Acquisition Year and Day of Year
• HHMM = Acquisition Hour and Minute
• CCC = Collection number
• nc = NetCDF4

"

Production Frequency:
240 files per day

Spatial Coverage:
Global

Spatial Resolution:
375m at nadir

File Size (MB):
~170

Related Links:
VIIRS Level 1 Product User's Guide

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

Author (PI), et al., 2024. 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:
https://doi.org/10.5067/VIIRS/VJ202IMG_NRT.002