SWOT Simulated Nadir SSH: ECCO LLC4320 Model for Cal/Val

SWOT Simulated Level-2 Nadir SSH from MITgcm ECCO LLC4320 for Cal/Val Version 1 provides simulated sea surface height data formatted to match the future Surface Water and Ocean Topography (SWOT) mission's Level 2 altimetry product. The data are generated by the high-resolution ECCO LLC4320 global ocean simulation, which assimilates observational data using the MIT general circulation model. This simulation aids in the development and calibration of data products for the operational SWOT mission.

Use Cases

• Calibrating and validating SWOT Level 2 sea surface height retrieval algorithms based on the simulated data format.
• Studying high-resolution ocean dynamics using a model with a nominal ~2-km horizontal grid.
• Developing data assimilation techniques by comparing the ECCO model state with simulated satellite observations.
• Testing downstream data processing workflows for the future SWOT operational data stream.

Strengths

• Data is simulated at a high nominal horizontal resolution of 1/48-degrees (~2 km at the equator).
• Produced by the ECCO consortium's data-assimilating model, which integrates numerous observational sources.
• Formatted specifically to aid development for the upcoming SWOT mission, indicating direct practical utility.

Limitations

• Critical metadata is missing: specific column names, row counts, and file sizes are not provided in any source.
• Conflicting 'last updated' dates exist between platforms (2012 vs. 2026), casting doubt on data currency.
• The license is ambiguously listed as 'other-license-specified' without details on usage restrictions.

Provenance

Source

National Aeronautics and Space Administration (NASA)

Collection Method

Simulated data generated by the 'ECCO LLC4320' global ocean model based on the MITgcm.

Freshness

2026-04-09 21:46:31.438301

Geography

Global ocean coverage.