Suomi NPP CrIMSS CHART: Cloud-Cleared Radiances from Infrared and Microwave Sounders

Suomi NPP satellite's CrIS/ATMS instruments provide 1305 infrared and 22 microwave channels for atmospheric profiling. The CHART algorithm applies cloud-clearing to 3x3 CrIS fields of view within an ATMS field of regard, deriving clear-sky radiances using a neural network initial guess and AIRS Version-6.6 methodologies. This limited edition collection contains retrieved geophysical parameters characterizing the full atmospheric state.

Use Cases

• Validating cloud-clearing assumptions by analyzing radiance differences across a 3x3 CrIS field-of-view array.
• Comparing retrieval methodologies against the AIRS Version-6.6 algorithm baseline for consistency.
• Profiling atmospheric state using combined infrared (655-2550 cm-1) and microwave (23-183 GHz) spectral data.
• Training or testing neural network systems for initial guess generation in atmospheric retrieval pipelines.

Strengths

• Combines high-resolution infrared spectral data (1305 channels) with microwave data (22 channels) for a comprehensive atmospheric view.
• Applies a mature, heritage retrieval methodology (AIRS Version-6.6) with a neural network initial guess.
• Cloud-clearing process operates on a physically defined scene (ATMS FOR containing 3x3 CrIS FOVs).

Limitations

• Critical metadata is missing: specific column names, dataset size, and row counts are not provided.
• Conflicting last updated dates exist (2015-11-01 and 2026-04 09), casting doubt on data freshness and maintenance.
• The 'limited edition' designation suggests the collection may be experimental or have restricted temporal coverage.

Provenance

Source

GES_DISC (Goddard Earth Sciences Data and Information Services Center)

Collection Method

Satellite remote sensing from the Suomi NPP platform's CrIS (Cross-track Infrared Sounder) and ATMS (Advanced Technology Microwave Sounder) instruments.

Time Range

null

Freshness

2026-04-09 22:55:23.354977 (though a conflicting date of 2015-11-01 exists)

Geography

Global coverage from the Suomi NPP polar-orbiting satellite.