CHIRP: Calibrated Hyperspectral Infrared Radiances from JPSS-1/NOAA-20

The Climate Hyperspectral Infrared Radiance Product (CHIRP) is a Level 1 satellite radiance product derived from the CrIS instrument on the JPSS-1/NOAA-20 platform. It provides a consistent spectral response function across instruments, with radiometric offsets removed using SNPP-CrIS as a standard. This specific version, SNDR13CHRP1J1Cal, contains JPSS-1 data from February 17, 2018 through August 31, 2018.

Use Cases

• Calibrating atmospheric retrieval algorithms based on consistent spectral response functions.
• Analyzing time-series trends in infrared radiance for climate studies.
• Cross-comparing radiance measurements from different satellite instruments.
• Studying atmospheric aerosols and chemistry using hyperspectral infrared data.

Strengths

• Provides a consistent spectral response function across AIRS and CrIS instruments, facilitating cross-platform analysis.
• Contains JPSS-1/NOAA-20 data for a specific time period (February 17 to August 31, 2018).
• Follows granule-in, granule-out storage and includes fields needed for retrievals, such as cross-track and along-track information.

Limitations

• Column names and exact data structure are unknown from the provided metadata.
• There is a conflict in the 'last updated' metadata between platforms (2026-04-09 vs. 2018-09-01).
• The dataset size and row count are not specified.

Provenance

Source

GES_DISC, derived from the JPSS-1 (NOAA-20) CrIS instrument.

Collection Method

Satellite remote sensing, processed into Level 1 radiance product.

Time Range

February 17, 2018 through August 31, 2018.

Freshness

The most recent update date recorded across platforms is 2026-04-09.

Geography

Global coverage from sun-synchronous 13:30 orbit satellite.