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

Metadata Updated: May 27, 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:

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.

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



Metadata Created Date December 1, 2022
Metadata Updated Date May 27, 2024

Metadata Source

Harvested from NASA Data.json

Graphic Preview

Sample plot of CrIS/ATMS Level 3 daily surface skin temperature (K).

Additional Metadata

Resource Type Dataset
Metadata Created Date December 1, 2022
Metadata Updated Date May 27, 2024
Publisher Not provided
Identifier C1692982094-GES_DISC
Data First Published 2018-02-17
Language en-US
Data Last Modified 2024-04-30
Category JPSS, geospatial
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Citation Chris Barnet. 2019-12-15. SNDRJ1IML3CDCCP. Version 2. Sounder SIPS: JPSS-1 CrIS Level 3 Comprehensive Quality Control Gridded Daily CLIMCAPS V2. Greenbelt, MD, USA. Archived by National Aeronautics and Space Administration, U.S. Government, Goddard Earth Sciences Data and Information Services Center (GES DISC). Digital Science Data.
Creator Chris Barnet
Data Presentation Form Digital Science Data
Graphic Preview Description Sample plot of CrIS/ATMS Level 3 daily surface skin temperature (K).
Graphic Preview File
Harvest Object Id ee83c786-d3d8-47a5-be0a-a9ac2e56a672
Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
Harvest Source Title NASA Data.json
Homepage URL
Metadata Type geospatial
Old Spatial -180.0 -90.0 180.0 90.0
Program Code 026:001
Related Documents,,,,,
Release Place Greenbelt, MD, USA
Source Datajson Identifier True
Source Hash a9b45e730dc7f4320a527e888bc8debaf0c1636e5bb5bb95569c51108dc9bb2c
Source Schema Version 1.1
Temporal 2018-02-17T00:00:00Z/2024-05-27T00:00:00Z

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