Imaging · dataset · 2025
Sounder SIPS: Suomi NPP CrIMSS Level 2 CLIMCAPS Full Spectral Resolution: Cloud Cleared Radiances V2 at GES DISC
Listed in NASA Data Portal
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).
Description
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 NSR 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. Cloud clearing is the process of computing the clear column radiance for a given channel n, and represents what the channel would have observed if the entire scene were cloud free.
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The entire scene is defined as the ATMS field of regard (FOR) which includes and array of 3x3 CrIS field of views (FOV). The basic assumption of cloud-clearing is that if the observed radiances in each field-of-view are different, the differences in the observed radiances are solely attributed to the differences in the fractional cloudiness in each field of view while everything else (surface properties and atmospheric state) is uniform across the field of regard.
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. 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.
Links
Get the data
- Google Scholar search results scholar.google.com/scholar?q=10.5067%2FATJX1J10VOMU ↗
download · from data nasa gov
- Get a related visualization docserver.gesdisc.eosdis.nasa.gov/public/project/Images/SNDRSNIML2CCPCCR_2.png ↗
download · from data nasa gov
- This dataset's landing page disc.gsfc.nasa.gov/datacollection/SNDRSNIML2CCPCCR_2.html ↗
download · from data nasa gov
- Download this dataset through a directory map sounder.gesdisc.eosdis.nasa.gov/data/SNPP_Sounder_Level2/SNDRSNIML2CCPCCR.2 ↗
download · from data nasa gov
- Use OPeNDAP to access the dataset's data sounder.gesdisc.eosdis.nasa.gov/opendap/SNPP_Sounder_Level2/SNDRSNIML2CCPCCR.2 ↗
download · from data nasa gov
- Download this dataset through Earthdata Search search.earthdata.nasa.gov/search?q=SNDRSNIML2CCPCCR_2 ↗
download · from data nasa gov
- View this dataset's read me document docserver.gesdisc.eosdis.nasa.gov/public/project/Sounder/CLIMCAPS.V2.README.pdf ↗
download · from data nasa gov
- docserver.gesdisc.eosdis.nasa.gov /public/project/Sounder/CLIMCAPS.V1.ATBD.pdf ↗
View this dataset's algorithm theoretical basis document
download · from data nasa gov
- View this dataset's product quality assessment docserver.gesdisc.eosdis.nasa.gov/public/project/Sounder/CLIMCAPS.V2.Test.Report.pdf ↗
download · from data nasa gov
- View this dataset's product usage docserver.gesdisc.eosdis.nasa.gov/public/project/Sounder/CLIMCAPS_V2_L2_science_guides.pdf ↗
download · from data nasa gov
Where it is published
- NASA Data Portal dataset page data.nasa.gov/dataset/sounder-sips-suomi-npp-crimss-level-2-climcaps-full-sp… ↗
landing page · from data nasa gov
Catalogue records · 1
- CKAN API data.nasa.gov/api/3/action/package_show?id=908d840d-71ac-4be7-b438-712a1af74… ↗
metadata API · from data nasa gov
Topics
Provenance · 1 source records, 9 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NASA Data Portal | 908d840d-71ac-4be7-b438-712a1af74cb7 | 11 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| concepts[field].anzsrc:field:400608 | mapping · data nasa gov | vocabulary-mapper@1.0.0 | keywords['microwave'] |
| concepts[field].local:field:earth-environmental | mapping · data nasa gov | vocabulary-mapper@1.0.0 | keywords['earth-science'] |
| concepts[field].local:field:engineering | mapping · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| created_date | source · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| description | source · data nasa gov | connector:data_nasa_gov@1.0.0 | /notes |
| license_text | source · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| publication_date | source · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| title | source · data nasa gov | connector:data_nasa_gov@1.0.0 | /title |
| updated_date | source · data nasa gov | connector:data_nasa_gov@1.0.0 |