Collection 2.1 JPSS2 Product Descriptions: VJ202MOD_NRT
Last update: January 28, 2025
Data Set Short Name:
VJ202MOD_NRT
Data Set Long Name:
VIIRS/JPSS2 Moderate Resolution 6-Min L1B Swath SDR 750m NRT
Platform:
Joint Polar Satellite System-2 (JPSS-2/NOAA-21)
Instrument:
Visible-Infrared Imaging-Radiometer Suite (VIIRS)
Product Description:
The Near Real Time (NRT) VIIRS/JPSS2 Moderate Resolution 6-Min L1B Swath 750m, short-name VJ202MOD_NRT is the Joint Polar-orbiting Satellite System-2 (JPSS-2/NOAA-21; referred to hereafter as J2) platform-derived NASA VIIRS L1B calibrated radiances product that comprises of sixteen moderate-resolution or M-bands with a spatial resolution of 750-meters at nadir. These M-bands comprise eleven reflective solar bands (RSB) and five thermal emissive bands (TEB). Each of the M-bands has 16 detectors in the along-track direction with 16 rows of pixels per scan that provide a 750-m resolution. Ranging in wavelengths from 0.402 µm to 12.49 µm, the M-bands are sensitive to visible, 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 750-m swath product measure 3232 lines by 3200 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 = "VJ202MOD_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:
750m at nadir
File Size (MB):
~130
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/VJ202MOD_NRT.021
