SWOT MOE: Satellite Orbit Ephemeris Data

NASA's SWOT Medium-accuracy Orbit Ephemeris (MOE) provides daily position and velocity vectors for a satellite's center of mass. The data is organized into 26-hour netCDF-4 files centered on each day in TAI time, with a latency of less than 1.5 days. This dataset is used for forward stream processing in satellite mission analysis.

Use Cases

• Trajectory prediction and validation based on daily position and velocity vectors.
• Gravitational field modeling of Earth using precise satellite orbital data.
• Forward stream processing for satellite missions based on the MOE product specification.
• Orbital characteristic analysis using the 26-hour centered time windows.

Strengths

• Data is produced by NASA, indicating an authoritative institutional source.
• Has a defined latency of less than 1.5 days, suggesting regular updates.
• Available on multiple government platforms (Data.gov, NASA Earthdata), indicating established use.

Limitations

• Column names and specific data structure are not documented in the provided metadata.
• Exact file sizes and row counts are unknown, limiting assessment of data volume.
• License is listed as 'other-license-specified' without explicit terms.

Provenance

Source

National Aeronautics and Space Administration (NASA)

Collection Method

Likely generated from satellite tracking and telemetry data.

Time Range

Data is organized into daily files; the overall temporal coverage is not specified.

Freshness

Last updated on 2026 04 09 according to Data.gov entries.

Geography

Global, based on satellite orbital coverage.