Skip to main content
U.S. flag

An official website of the United States government

Sounder SIPS: Suomi NPP CrIMSS Level 3 Comprehensive Quality Control Gridded Daily CLIMCAPS Full Spectral Resolution V2 at GES DISC

Published by Not provided | National Aeronautics and Space Administration | Catalog Last Checked: May 26, 2026 at 07:18 PM | Dataset Last Updated: March 31, 2025
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 Suomi National Polar-orbiting Partnership (SNPP) platform and use the Full Spectral Resolution (FSR) data. The CrIS instrument is a Fourier transform spectrometer with a total of 2211 FSR infrared sounding channels covering the longwave (645-1095 cm-1), midwave (1210-1750 cm-1), and shortwave (2000-2550 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. This daily one degree latitude by one degree longitude level-3 product starts with level-2 retrieval products with QC values of 0 (best), 1 (good), and 2 (don't use) which are provided for each variable. Comprehensive QC accepts a retrieval if the profile is good to the surface and ensures consistent analysis across all levels and variables.

Resources

8 resources available

  • Download this dataset through a directory map

    HTML
    Download

  • Use OPeNDAP to access the dataset's data

    HTML
    Download

  • This dataset's landing page

    HTML
    Download

  • View this dataset's algorithm theoretical basis document

    PDF
    Download

  • View this dataset's read me document

    PDF
    Download

  • Get a related visualization

    PNG
    Download

  • Google Scholar search results

    HTML
    Download

  • Download this dataset through Earthdata Search

    HTML
    Download

Find Related Datasets

Search by Tags

Click any tag below to search for similar datasets

Complete Metadata
@type dcat:Dataset
accessLevel public
bureauCode 
[
  "026:00"
]
contactPoint 
{
  "fn": "Lena Iredell",
  "@type": "vcard:Contact",
  "hasEmail": "mailto:lena.iredell@nasa.gov"
}
description 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 Suomi National Polar-orbiting Partnership (SNPP) platform and use the Full Spectral Resolution (FSR) data. The CrIS instrument is a Fourier transform spectrometer with a total of 2211 FSR infrared sounding channels covering the longwave (645-1095 cm-1), midwave (1210-1750 cm-1), and shortwave (2000-2550 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. This daily one degree latitude by one degree longitude level-3 product starts with level-2 retrieval products with QC values of 0 (best), 1 (good), and 2 (don't use) which are provided for each variable. Comprehensive QC accepts a retrieval if the profile is good to the surface and ensures consistent analysis across all levels and variables.
distribution 
[
  {
    "@type": "dcat:Distribution",
    "title": "Download this dataset through a directory map",
    "format": "HTML",
    "mediaType": "text/html",
    "description": "Access the data via HTTPS.",
    "downloadURL": "https://sounder.gesdisc.eosdis.nasa.gov/data/SNPP_Sounder_Level3/SNDRSNIML3CDCCP.2"
  },
  {
    "@type": "dcat:Distribution",
    "title": "Use OPeNDAP to access the dataset's data",
    "format": "HTML",
    "mediaType": "text/html",
    "description": "Access the data via the OPeNDAP protocol.",
    "downloadURL": "https://sounder.gesdisc.eosdis.nasa.gov/opendap/SNPP_Sounder_Level3/SNDRSNIML3CDCCP.2/"
  },
  {
    "@type": "dcat:Distribution",
    "title": "This dataset's landing page",
    "format": "HTML",
    "mediaType": "text/html",
    "description": "Access the dataset landing page from the GES DISC website.",
    "downloadURL": "https://disc.gsfc.nasa.gov/datacollection/SNDRSNIML3CDCCP_2.html"
  },
  {
    "@type": "dcat:Distribution",
    "title": "View this dataset's algorithm theoretical basis document",
    "format": "PDF",
    "mediaType": "application/pdf",
    "description": "CLIMCAPS ATBD",
    "downloadURL": "https://docserver.gesdisc.eosdis.nasa.gov/public/project/Sounder/CLIMCAPS.V2.ATBD.pdf"
  },
  {
    "@type": "dcat:Distribution",
    "title": "View this dataset's read me document",
    "format": "PDF",
    "mediaType": "application/pdf",
    "description": "CLIMCAPS Product User Guide:File Format and Definition",
    "downloadURL": "https://docserver.gesdisc.eosdis.nasa.gov/public/project/Sounder/CLIMCAPS.L3.V2.README.pdf"
  },
  {
    "@type": "dcat:Distribution",
    "title": "Get a related visualization",
    "format": "PNG",
    "mediaType": "image/png",
    "description": "Sample plot of CrIS/ATMS Level 3 daily surface skin temperature (K).",
    "downloadURL": "https://docserver.gesdisc.eosdis.nasa.gov/public/project/Images/SNDRSNIML3CDCCP_2.png"
  },
  {
    "@type": "dcat:Distribution",
    "title": "Google Scholar search results",
    "format": "HTML",
    "mediaType": "text/html",
    "description": "Search results for publications that cite this dataset by its DOI.",
    "downloadURL": "https://scholar.google.com/scholar?q=10.5067%2FL98ZW61HG7TI"
  },
  {
    "@type": "dcat:Distribution",
    "title": "Download this dataset through Earthdata Search",
    "format": "HTML",
    "mediaType": "text/html",
    "description": "Search the Earthdata website",
    "downloadURL": "https://search.earthdata.nasa.gov/search?q=SNDRSNIML3CDCCP+2"
  }
]
identifier C1692982085-GES_DISC
issued 2015-11-02
keyword 
[
  "air-quality",
  "altitude",
  "atmosphere",
  "atmospheric-chemistry",
  "atmospheric-pressure",
  "atmospheric-radiation",
  "atmospheric-temperature",
  "atmospheric-water-vapor",
  "clouds",
  "earth-science",
  "land-surface",
  "ocean-temperature",
  "oceans",
  "precipitation",
  "surface-radiative-properties",
  "surface-thermal-properties"
]
landingPage https://doi.org/10.5067/L98ZW61HG7TI
language 
[
  "en-US"
]
modified 2025-03-31
programCode 
[
  "026:001"
]
publisher 
{
  "name": "Not provided",
  "@type": "org:Organization"
}
references 
[
  "https://doi.org/10.1016/S0022-4073(97)00169-6",
  "https://doi.org/10.1029/2005/JD007020",
  "https://doi.org/10.1109/TGRS.2002.808236",
  "https://doi.org/10.1109/TGRS.2012.2220369",
  "https://doi.org/10.3390/rs11101227",
  "https://doi.org/10.5194/amt-13-4437-2020"
]
spatial -180.0 -90.0 180.0 90.0
temporal 2015-11-02T00:00:00Z/2023-02-28T00:00:00Z
theme 
[
  "SUOMI-NPP",
  "geospatial"
]
title Sounder SIPS: Suomi NPP CrIMSS Level 3 Comprehensive Quality Control Gridded Daily CLIMCAPS Full Spectral Resolution V2 at GES DISC

data.gov

An official website of the GSA's Technology Transformation Services

Looking for U.S. government information and services?
Visit USA.gov