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    • Sounder SIPS: JPSS-1 CrIS Level 2 CLIMCAPS: Atmosphere cloud and surface geophysical state V2 (SNDRJ1IML2CCPRET) at GES DISC

    Metadata Updated: May 6, 2024

    WARNING: To users of the derived product “co_mmr_midtrop” (carbon monoxide mass mixing ratio to dry air [kg/kg] at ~500 hPa). This variable has a significant bias due to a conversion error: the molecular weight of carbon dioxide (CO2, 44.01 g/mol) was used instead of carbon monoxide (CO, 28.01 g/mol). To correct, simply multiply “co_mmr_midtrop” by 28.01/44.01. Alternatively, derive a profile of mass mixing ratio from scratch using the retrieved column density values (“mol_lay/co_mol_lay”) in the Level 2 files. For further questions or concerns please contact the Sounder SIPS at: sounder.sips@jpl.nasa.gov

    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.

    The CLIMCAPS algorithm uses an Optimal Estimation methodology and uses an a-priori first guess to start the process. A CLIMCAPS sounding is comprised of a set of parameters that characterizes the full atmospheric state and includes a variety of geophysical parameters derived from the CrIMSS data. These include surface temperature and infrared emissivity; full atmosphere profiles of temperature, water vapor and ozone; infrared effective cloud top characteristics; carbon monoxide, methane, carbon dioxide, sulfur dioxide, nitrous oxide, and nitric acid. 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.

    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.

    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
    https://doi.org/10.5194/amt-13-4437-2020

    Dates

    Metadata Created Date November 12, 2020
    Metadata Updated Date May 6, 2024

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Graphic Preview

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

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date November 12, 2020
    Metadata Updated Date May 6, 2024
    Publisher Not provided
    Maintainer
    Identifier C1692982090-GES_DISC
    Data First Published 2018-02-17
    Language en-US
    Data Last Modified 2024-04-01
    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. SNDRJ1IML2CCPRET. Version 2. Sounder SIPS: JPSS-1 CrIS Level 2 CLIMCAPS: Atmosphere cloud and surface geophysical state 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/LESQUBLWS18H. https://disc.gsfc.nasa.gov/datacollection/SNDRJ1IML2CCPRET_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 Retrieval.
    Graphic Preview File https://docserver.gesdisc.eosdis.nasa.gov/public/project/Images/SNDRJ1IML2CCPRET_2.png
    Harvest Object Id 34ddc551-19dc-471f-a665-c20e2a829d59
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://doi.org/10.5067/LESQUBLWS18H
    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, https://doi.org/10.5194/amt-13-4437-2020
    Release Place Greenbelt, MD, USA
    Series Name SNDRJ1IML2CCPRET
    Source Datajson Identifier True
    Source Hash f7875dd4cabf589b59416ed271601bde318364268a806aea4b825a3548f5f9c5
    Source Schema Version 1.1
    Spatial
    Temporal 2018-02-17T00:00:00Z/2024-05-06T00:00:00Z

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