GHRSST Level 2P Sea Surface Temperature from EWS-G1 Satellite over Indian Ocean

Indian Ocean sea surface temperature data at 0.04-degree spatial resolution, produced by the Naval Oceanographic Office from the EWS-G1 geostationary satellite. The dataset provides 48 half-hour granules per day, with data calculated from 4-micron and 11-micron channels for nighttime and daytime measurements, updated with a 24-hour latency. It follows the GHRSST Data Specification version 2 and has been fully operational since September 8, 2020.

Use Cases

• Modeling diurnal sea surface temperature cycles based on half-hourly temporal resolution.
• Analyzing regional ocean heat content in the Indian Ocean based on geospatial coverage.
• Validating atmospheric correction algorithms for satellite-derived SST based on multi-channel (4-micron and 11-micron) data.
• Monitoring thermal conditions for maritime operations based on near-real-time data with 24-hour latency.

Strengths

• Provides data at a high spatial resolution of 0.04 degrees.
• Offers high temporal frequency with 48 half-hour granules produced per day.
• Follows a standardized international specification (GHRSST Data Specification version 2).
• Data is updated with a consistent, known latency of 24 hours.

Limitations

• Daytime sea surface temperatures are not produced in areas where the solar reflection angle exceeds 50 degrees, creating data gaps.
• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and total dataset size are unknown, which may limit suitability assessment.

Provenance

Source

The Naval Oceanographic Office (NAVO) and National Aeronautics and Space Administration.

Collection Method

Derived from the GOES Imager sensor on the Electro-Optical Infrared Weather System – Geostationary satellite (EWS-G1).

Time Range

Fully operational since September 8, 2020; data is continually updated.

Freshness

Last updated 2026-03-13 02:41:04.476518; freshness should be verified.

Geography

Indian Ocean region, centered at 60.0° West longitude.