GHRSST Level 2P: Global 8.8 km Sea Surface Temperature from NOAA-18 AVHRR

A global sea surface temperature dataset produced in real-time from the Advanced Very High Resolution Radiometer on the NOAA-18 satellite. The data is derived from Global Area Coverage (GAC) sampling, yielding a final resolution of 8.8 km, and is used operationally by the US Naval Oceanographic Office. The AVHRR sensor measures radiance in 5 or 6 spectral bands, with the 11 and 12 micron channels typically used for SST retrieval.

Use Cases

• Modeling ocean heat content and climate patterns based on global sea surface temperature measurements.
• Validating and calibrating other satellite or in-situ ocean temperature data based on the described AVHRR spectral band methodology.
• Assimilating real-time SST data into operational oceanographic forecasts as mentioned in the description.
• Studiating diurnal temperature cycles based on the twice-daily sun-synchronous satellite coverage described.

Strengths

• Data is produced in real-time for operational use by the US Naval Oceanographic Office.
• Derived from a sensor with an operational legacy tracing back to 1978, suggesting a long-term methodology.
• Final dataset has a defined spatial resolution of 8.8 km.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• The effective resolution is reduced from the sensor's native 1.1 km to 8.8 km due to on-board averaging and binning.
• Row count is unknown, which may limit suitability assessment for large-scale ML projects.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Multi-channel sea surface temperature retrievals from the AVHRR sensor on the NOAA-18 satellite.

Time Range

Satellite launched 20 May 2005; dataset is produced in real-time.

Freshness

Last updated 2026-03-13 02:41:41.173122; freshness should be verified.

Geography

Global