SWOT Simulated Nadir SSH: GLORYS-Based Cal/Val Data

SWOT Simulated Level-2 Nadir SSH from GLORYS for Cal/Val Version 1 provides simulated sea surface height data formatted to match the future SWOT satellite's Level 2 product specification. The data, derived from the Global Ocean Reanalysis and Simulations (GLORYS) model, are intended to support calibration, validation, and product development for the Surface Water and Ocean Topography (SWOT) mission. This simulation aids researchers and engineers in preparing for operational data from the mission's Poseidon 3C nadir altimeter.

Use Cases

• Calibrating and validating SWOT Level 2 sea surface height algorithms based on simulated nadir altimeter data.
• Developing data processing workflows for future SWOT operational phases using the prescribed PDD format.
• Studying ocean surface topography and dynamics using a high-resolution model reanalysis (GLORYS).
• Testing data assimilation systems that will incorporate SWOT nadir observations.

Strengths

• Data is specifically formatted to the SWOT Level 2 Product Description Document (PDD), ensuring direct relevance for mission preparation.
• Derived from the established GLORYS global ocean reanalysis and simulation system.
• Hosted on multiple authoritative platforms (NASA Earthdata, Data.gov), indicating recognized importance.

Limitations

• Column names and dataset size (rows, file size) are not provided in any source, limiting technical assessment.
• Conflicting 'last updated' dates exist (2015-12-31 and 2026-04 09), creating uncertainty about data freshness.
• License is ambiguously listed as 'other-license-specified' or 'None', requiring further investigation for use.

Provenance

Source

Global Ocean Reanalysis and Simulations (GLORYS), processed for the SWOT mission.

Collection Method

Simulation; GLORYS model output rendered into the SWOT L2 SSH PDD format.

Time Range

null

Freshness

2026 04-09 21:50:13.175372 (conflict with 2015-12-31 date noted)

Geography

Global ocean coverage, inferred from GLORYS source.