The first relates to how VIIRS scan sync loss events are addressed while the other correctly characterizes VIIRS pixels that should have been identified as falling within a CrIS Field-of-View.
The v2.0 product also includes a couple of improvements to the VIIRS-CrIS collocation. Such a process has helped salvage and using granules with continuous blocks of good data with good calibration. In the v2.0 Fusion product, the quality check of the input VIIRS data is now performed for individual scanlines instead of checking the entire input granule as was done in the previous version of this product. This L2 NOAA-20 VIIRS+CrIS product release relates to Version-2.0 (v2.0) collection, which has undergone some improvements over its previous version.
11 µm and 12 µm window (bands 31 and 32). Using both VIIRS and CrIS inputs, this product helps derive MODIS-equivalent fusion-based radiances for VIIRS in the following absorption regions (the analogue MODIS bands in parenthesis): This innovative fusion-based product between an imager and a sounder instrument is necessitated by the VIIRS instrument’s lack of IR bands that are responsive to atmospheric absorption. This Level-2 (L2) swath product leverages the VIIRS and CrIS instruments’ assets to create narrowband radiances based on the Aqua Moderate resolution Imaging Spectroradiometer’s (MODIS) spectral response functions. In support of the primary goal of the Joint Polar Satellite System-1’s mission (JPSS-1 was renamed NOAA-20 after it reached its final orbit) to provide continuity in the portfolio of Earth science data products with those derived from the Earth Observing System (EOS) Terra and Aqua missions, the Visible Infrared Imaging Radiometer Suite (VIIRS) and Cross-track Infrared Sounder (CrIS) Fusion is a novel product.
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