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Sounder SIPS: JPSS-1 CrIS Level 3 Comprehensive Quality Control Gridded Daily CLIMCAPS V2 (SNDRJ1IML3CDCCP) at GES DISC

Published by NASA/GSFC/SED/ESD/TISL/GESDISC | National Aeronautics and Space Administration | Catalog Last Checked: May 18, 2026 at 03:09 PM | Dataset Last Updated: May 11, 2026
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. 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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earth-science-air-quality-atmosphere-tropospheric-ozone earth-science-altitude-atmosphere-tropopause earth-science-atmospheric-chemistry-atmosphere-carbon-and-hydrocarbon-compounds-methane earth-science-atmospheric-chemistry-atmosphere-oxygen-compounds-atmospheric-ozone earth-science-atmospheric-pressure-atmosphere-surface-pressure earth-science-atmospheric-radiation-atmosphere-outgoing-longwave-radiation earth-science-atmospheric-temperature-atmosphere-surface-temperature earth-science-atmospheric-temperature-atmosphere-surface-temperature-air-temperature

Complete Metadata
@type dcat:Dataset
accessLevel public
bureauCode 
                                            [
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}
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 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. 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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identifier 10.5067/111ANV0FK5CY
keyword 
                                            [
  "earth-science-air-quality-atmosphere-tropospheric-ozone",
  "earth-science-altitude-atmosphere-tropopause",
  "earth-science-atmospheric-chemistry-atmosphere-carbon-and-hydrocarbon-compounds-methane",
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  "earth-science-atmospheric-water-vapor-atmosphere-water-vapor-indicators-total-precipitable-wate",
  "earth-science-atmospheric-water-vapor-atmosphere-water-vapor-profiles",
  "earth-science-clouds-atmosphere-cloud-properties-cloud-fraction",
  "earth-science-clouds-atmosphere-cloud-properties-cloud-top-pressure",
  "earth-science-clouds-atmosphere-cloud-properties-cloud-top-temperature",
  "earth-science-clouds-atmosphere-cloud-properties-cloud-vertical-distribution",
  "earth-science-ocean-temperature-oceans-sea-surface-temperature",
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  "earth-science-surface-radiative-properties-land-surface-emissivity",
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]
license https://www.usa.gov/government-works
modified 2026-05-11
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                                            [
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publisher 
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spatial 
                                            "["CARTESIAN",[{"WestBoundingCoordinate":-180,"NorthBoundingCoordinate":90,"EastBoundingCoordinate":180,"SouthBoundingCoordinate":-90}]]"
temporal 2018-02-17/2026-05-04
theme 
                                            [
  "Earth Science"
]
title Sounder SIPS: JPSS-1 CrIS Level 3 Comprehensive Quality Control Gridded Daily CLIMCAPS V2 (SNDRJ1IML3CDCCP) at GES DISC

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