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    • Sounder SIPS: JPSS-1 CrIS Level 2 CLIMCAPS: Cloud Cleared Radiances V2 (SNDRJ1IML2CCPCCR) at GES DISC

    Metadata Updated: March 4, 2025

    The CLIMCAPS (Community Long-term Infrared Microwave Coupled Product System) algorithm is used to analyze data from the Cross-track Infrared Sounder/Advanced Technology Microwave Sounder (CrIS/ATMS) instruments, also known as CrIMSS (Cross-track Infrared and Microwave Sounding Suite). The CrIS/ATMS instruments used for this product are on board the NOAA-20 platform, also known as JPSS-1. The CrIS instrument is a Fourier transform spectrometer with a total of 2211 FSR (Full Spectral Resolution) infrared sounding channels covering the longwave (645-1095 cm-1), midwave (1210-1750 cm-1), and shortwave (2100-2550 cm-1) spectral regions. The ATMS instrument is a cross-track scanner with 22 channels in spectral bands from 23 GHz through 183 GHz.

    Cloud clearing is the process of computing the clear column radiance for a given channel n, and represents what the channel would have observed if the entire scene were cloud free. The entire scene is defined as the ATMS field of regard (FOR) which includes and array of 3x3 CrIS field of views (FOV). The basic assumption of cloud-clearing is that if the observed radiances in each field-of-view are different, the differences in the observed radiances are solely attributed to the differences in the fractional cloudiness in each field of view while everything else (surface properties and atmospheric state) is uniform across the field of regard.

    A level 2 granule has been set as 6 minutes of data, 30 footprints cross track by 45 lines along track. There are 240 granules per day, with an orbit repeat cycle of approximately 16 day.

    The CLIMCAPS algorithm uses data from the second Modern-Era Retrospective analysis for Research and Applications (MERRA-2) as a first-guess for the atmospheric state. Because MERRA-2 products typically have a latency from 3 to 7 weeks, so too do the CLIMCAPS products.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    References

    https://doi.org/10.3390/rs11101227
    https://doi.org/10.1109/TGRS.2012.2220369
    https://doi.org/10.1109/JSTARS.2017.2670504
    https://doi.org/10.1016/S0022-4073(97)00169-6
    https://doi.org/10.1109/TGRS.2002.808236
    https://doi.org/10.1029/2005/JD007020

    Dates

    Metadata Created Date November 12, 2020
    Metadata Updated Date March 4, 2025

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Graphic Preview

    Sample plot of NOAA-20 (JPSS-1) CrIS/ATMS CLIMCAPS Level 2 Cloud Cleared Radiances.

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date November 12, 2020
    Metadata Updated Date March 4, 2025
    Publisher Not provided
    Maintainer
    Identifier C1692982092-GES_DISC
    Data First Published 2018-02-17
    Language en-US
    Data Last Modified 2025-02-01
    Category JPSS, geospatial
    Public Access Level public
    Bureau Code 026:00
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://data.nasa.gov/data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Citation Chris Barnet. 2019-12-15. SNDRJ1IML2CCPCCR. Version 2. Sounder SIPS: JPSS-1 CrIS Level 2 CLIMCAPS: Cloud Cleared Radiances V2. Greenbelt, MD, USA. Archived by National Aeronautics and Space Administration, U.S. Government, Goddard Earth Sciences Data and Information Services Center (GES DISC). https://doi.org/10.5067/KE4WCXM829A3. https://disc.gsfc.nasa.gov/datacollection/SNDRJ1IML2CCPCCR_2.html. Digital Science Data.
    Creator Chris Barnet
    Data Presentation Form Digital Science Data
    Graphic Preview Description Sample plot of NOAA-20 (JPSS-1) CrIS/ATMS CLIMCAPS Level 2 Cloud Cleared Radiances.
    Graphic Preview File https://docserver.gesdisc.eosdis.nasa.gov/public/project/Images/SNDRJ1IML2CCPCCR_2.png
    Harvest Object Id 2c68d69c-3439-43a0-8d4e-0df82a5c2eee
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://doi.org/10.5067/KE4WCXM829A3
    Metadata Type geospatial
    Old Spatial -180.0 -90.0 180.0 90.0
    Program Code 026:001
    Related Documents https://doi.org/10.3390/rs11101227, https://doi.org/10.1109/TGRS.2012.2220369, https://doi.org/10.1109/JSTARS.2017.2670504, https://doi.org/10.1016/S0022-4073(97)00169-6, https://doi.org/10.1109/TGRS.2002.808236, https://doi.org/10.1029/2005/JD007020
    Release Place Greenbelt, MD, USA
    Series Name SNDRJ1IML2CCPCCR
    Source Datajson Identifier True
    Source Hash 9accc5f88bf85ff3deaa2ba3761ff490aeddf3b277243963d68c2f0b13670a0c
    Source Schema Version 1.1
    Spatial
    Temporal 2018-02-17T00:00:00Z/2025-03-03T00:00:00Z

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