CHIRP: Calibrated Hyperspectral Infrared Radiances from EOS-Aqua

SNDR13CHRP1AQCal is a Level 1 radiance product from NASA's GES DISC, providing calibrated hyperspectral infrared measurements from the Atmospheric Infrared Sounder (AIRS) on the EOS-Aqua satellite. This dataset applies a consistent spectral response function and removes inter-instrument offsets to create a standardized time series for climate studies. It contains all necessary retrieval information, such as cross-track, along-track, and field-of-view identifiers, and covers data from September 1, 2016, onward.

Use Cases

• Monitoring atmospheric composition trends based on calibrated hyperspectral infrared radiances.
• Validating climate and weather models using a standardized, cross-instrument radiance product.
• Studying aerosols and trace gases like sulfur dioxide through consistent spectral response functions.
• Conducting time-series analysis of Earth's infrared emissions for climate change research.

Strengths

• Provides a consistent, cross-calibrated record from multiple satellite instruments (AIRS, CrIS on SNPP and JPSS-1/NOAA-20).
• Contains all information needed for retrievals, including spatial and observational metadata.
• Time series starts on a specific date (September 1, 2016) and is intended to continue until the AIRS mission ends.

Limitations

• Critical metadata such as column names, row counts, and dataset size are not provided in any source.
• The license is ambiguously listed as 'other-license-specified' or 'None' across platforms, requiring further investigation.
• The dataset is a subset (AIRS-only data not in the main product), limiting its scope compared to the full multi-instrument CHIRP record.

Provenance

Source

NASA GES DISC, derived from the Atmospheric Infrared Sounder (AIRS) on the EOS-Aqua satellite.

Collection Method

Satellite remote sensing, with processing to apply a consistent spectral response function and remove radiometric offsets using SNPP-CrIS as the standard.

Time Range

From September 1, 2016, until the AIRS end of mission.

Freshness

2026-04-09 22:56:16.082538

Geography

Global coverage, inferred from satellite-based remote sensing.