NASA Suomi-NPP: Ammonia Profiles from CrIS Infrared Sounder

A limited edition collection of ammonia products generated by the ESSPA algorithm from the Cross-track Infrared Sounder (CrIS) instrument on the Suomi NPP satellite. The algorithm produces ammonia retrievals on every field of view, with data organized into 240 six-minute granules per day and an orbit repeat cycle of approximately 16 days. The underlying CrIS Level 1B data contains radiance measurements across 1,317 channels covering longwave, midwave, and shortwave infrared spectral regions.

Use Cases

• Monitoring atmospheric ammonia concentrations based on infrared spectral retrievals.
• Analyzing spatial and temporal patterns of ammonia pollution based on global satellite coverage.
• Validating and improving atmospheric chemistry models based on satellite-derived ammonia profiles.
• Studying the correlation between ammonia and other atmospheric parameters based on the integrated temperature and water profiles from CLIMCAPS products.

Strengths

• Data is derived from a sophisticated retrieval algorithm using an optimal estimation approach with a Levenberg-Marquardt algorithm.
• The CrIS instrument provides high spectral resolution with 1,317 channels across three infrared bands.
• The dataset offers high temporal granularity with 240 data granules produced per day.

Limitations

• Row count and dataset size are unknown, which may limit suitability assessment.
• Column-level documentation is absent; field semantics must be inferred after download.
• Last update date is unknown; freshness unverified.

Provenance

Source

NASA Suomi National Polar-orbiting Partnership (SNPP) satellite, Cross-track Infrared Sounder (CrIS) instrument.

Collection Method

Satellite remote sensing data processed by the ESSPA (Earth System Science Profiling Algorithm) framework and an AER optimal estimation algorithm.

Time Range

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Freshness

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Geography

Global coverage from a polar-orbiting satellite.