Sentinel-3A OLCI: Global Mapped Chlorophyll Concentration Near Real-time Data

Near real-time satellite-derived chlorophyll concentration data from the Sentinel-3A OLCI instrument, processed by the NASA Ocean Biology DAAC. The dataset provides a global mapped, reduced-resolution snapshot of ocean conditions using quicklook processing methods. Inputs and calibration for these products are described as less than optimal, representing data from a short time period within a single orbit.

Use Cases

• Monitor near real-time phytoplankton blooms based on chlorophyll concentration maps.
• Assess short-term changes in ocean productivity based on satellite-derived quicklook data.
• Validate or complement higher-fidelity ocean models with timely observational snapshots.

Strengths

• Data is produced in near real-time, enabling timely analysis.
• Provides global spatial coverage of ocean chlorophyll.
• Processed by the authoritative NASA Ocean Biology DAAC.

Limitations

• Description metadata is limited; actual data quality requires manual inspection after download.
• Quicklook processing uses less-than-optimal inputs and calibration, as stated in the description.
• Column-level documentation is absent; field semantics must be inferred after download.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Satellite observations from the Sentinel-3A OLCI instrument, processed into Level-3M mapped products.

Time Range

Near real-time (short time period within a single orbit).

Freshness

Last updated 2026-03-13 20:35:47.803052; freshness should be verified.

Geography

Global