JPSS1 Product Descriptions: VJ121IMG_NRT
Last update: October 25, 2023
Data Set Short Name:
VJ121IMG_NRT
Data Set Long Name:
VIIRS/JPSS1 Land Surface Temperature and Emissivity 6-Min L2 Swath 375 m
Platform:
Joint Polar-orbiting Satellite System-1 (JPSS-1; now NOAA-20)
Instrument:
Visible Infrared Imaging Radiometer Suite (VIIRS)
Product Description:
The Near Real Time (NRT) VIIRS/JPSS1 Land Surface Temperature and Emissivity 6-Min L2 Swath 750m product (VJ121IMG_NRT) is produced daily in 6-minute temporal increments of satellite acquisition. The VJ121IMG_NRT product uses a physics-based algorithm to dynamically retrieve both the Land Surface Temperature (LST) and emissivity simultaneously. The VJ121IMG_NRT is derived from the 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).
The VJ121IMG_NRT product is developed synergistically with the Moderate Resolution Imaging Spectroradiometer (MODIS) Land Surface Temperature and Emissivity (LST&E) Version 6.1 product (MOD21) using the same input atmospheric products and algorithmic approach based on the ASTER Temperature Emissivity Separation (TES) technique. The TES algorithm is combined with an improved Water Vapor Scaling (WVS) atmospheric correction scheme to stabilize the retrieval during very warm and humid conditions.
File_naming_convention = VJ121IMG_NRT.AYYYYDDD.HHMM.CCC.YYYYDDDHHMMSS.nc
- AYYYYDDD = Acquisition Year and Day of Year
- HHMM = Hour and minute of acquisition
- CCC = Collection number
- YYYYDDDHHMMSS = Production Date and Time
- nc = NetCDF4
For more information read the Product User's Guide
or visit the VIIRS Land website
Production Frequency:
~240 file per day
Spatial Coverage:
Global
Spatial Resolution:
375m
File Size (MB):
~275
Citation:
Dataset Originator/Creator:
NASA JPSS1 Land Science Team/Land, Atmosphere Near real-time Capability for EOS (LANCE)Moderate Resolution Imaging Spectroradiometer (MODIS)
Data Authors:
Glynn Hulley and Simon Hook
Dataset DOI:
http://doi.org/10.5067/VIIRS/VJ121IMG_NRT.002
