SWOT DORIS Level 1 Tracking Data: Daily Satellite Orbit Measurements

Daily tracking data files from the DORIS receiver onboard the SWOT satellite, available with a latency of less than two days. The data are generated using signals from DORIS ground beacons and are used for precise orbit determination of the SWOT spacecraft. This includes computing the precise orbit ephemeris (POE) and medium-accuracy orbit ephemeris (MOE) required for SWOT data processing.

Use Cases

• Precise orbit determination of the SWOT spacecraft based on DORIS ground beacon signals.
• Computing the precise orbit ephemeris (POE) for downstream SWOT data processing.
• Generating the medium-accuracy orbit ephemeris (MOE) used in SWOT mission workflows.
• Analyzing satellite orbital characteristics and gravitational field measurements.

Strengths

• Data is available with low latency (< 2 days), supporting near-real-time applications.
• Distributed in the standardized RINEX file format, one file per day.
• Cross-platform presence on NASA Earthdata and Data.gov indicates official importance and reliability.

Limitations

• Column names and data structure are not documented in the provided metadata.
• Conflicting metadata: one source lists an 'other-license-specified', while another lists no license.
• The dataset's size (row count, file size) is unknown across all sources.

Provenance

Source

POCLOUD (as listed on one platform)

Collection Method

Generated from signals received by the DORIS payload receiver onboard the SWOT satellite from DORIS ground beacons.

Time Range

Daily files, with a latency of < 2 days from measurement.

Freshness

Last updated: 2026-04-09 21:47:35.809717

Geography

Global, based on the network of DORIS ground beacons and the orbit of the SWOT satellite.