GHRSST Level 4 OSPO: Global Nighttime Sea Surface Temperature Analysis

A daily operational sea surface temperature analysis produced by NASA's Office of Satellite and Product Operations on a global 0.054-degree grid. The GHRSST Level 4 product combines nighttime data from AVHRR, VIIRS, GOES, JAMI satellites and in-situ buoy measurements using optimal interpolation. This dataset is specifically produced as a lower boundary condition for Numerical Weather Prediction models and adheres to the GHRSST Data Processing Specification version 2.

Use Cases

• Assimilating sea surface temperature data into Numerical Weather Prediction models based on its stated purpose as a boundary condition.
• Analyzing global ocean temperature patterns and anomalies based on the daily, multi-sensor foundation analysis.
• Validating satellite-derived sea surface temperature retrievals against the in-situ buoy data incorporated in the analysis.
• Studying diurnal warming effects by comparing this nighttime-only product with daytime analyses.

Strengths

• Data is produced daily on an operational basis, suggesting consistent availability.
• Analysis combines multiple satellite sensors (AVHRR, VIIRS, GOES, JAMI) and in-situ data, likely improving accuracy.
• Adheres to the standardized GHRSST Data Processing Specification (GDS) version 2 format.

Limitations

• Description metadata is limited; actual data quality requires manual inspection after download.
• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

National Aeronautics and Space Administration, Office of Satellite and Product Operations.

Collection Method

Optimal interpolation applied to multi-satellite and in-situ data.

Time Range

Daily production suggests ongoing temporal coverage.

Freshness

Last updated 2026-03-13 02:32:28.019145; freshness should be verified.

Geography

Global coverage on a 0.054-degree grid.