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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 | Metadata Last Checked: August 04, 2025 | Last Modified: 2025-03-31
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.

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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

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