VJ102IMG represents the short-name for the Joint Polar-orbiting Satellite System-1 (JPSS-1/NOAA20; referred to hereafter as J1) platform-derived NASA VIIRS L1B calibrated radiances product that comprise 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 variables in the observation data in the J1-derived VIIRS L1B calibration product are almost similar
to those from the SNPP-VIIRS L1B (collection-1) except for one major change: The J1 VIIRS L1B
calibration product’s quality flags include a detector quality flag with associated masks, their values and
meanings for all the bands (I, M, and DNB).
||NPP and JPSS1 VIIRS data 2.1 (ArchiveSet 5201)
|File Naming Convention:
- ESDT Earth Science Data Type or Shortname
- A Stands for Acquisition
- YYYYDDD Data acquisition year and Day-of-year per the Julian Calendar
- HHMM Acquisition Hour and Minute
- CCC Version ID of the data collection
- YYYYDDDHHMMSS Processing year, Day-of-year, UTC time (hour, minutes, seconds)
- Format File format suffix, which in the above case represents netCDF4/HDF5
||JPSS-1 VIIRS, L1B, Image resolution, I-bands, Calibrated Radiances