GPS Earth Orientation Parameters from NASA's GUARDIAN Network

Global Earth orientation parameters are provided as a time series derived from the GPS satellite constellation, processed by NASA's Jet Propulsion Laboratory Global Differential GPS Operations Centers. The dataset is part of the GUARDIAN network and is hosted by NASA's CDDIS. Files are updated regularly, with a metadata record indicating a last update in March 2026.

Use Cases

• Analyzing polar motion and nutation for studies of Earth's rotational dynamics.
• Providing critical input for precise orbit determination of Earth-orbiting satellites.
• Contributing to the maintenance and refinement of the International Terrestrial Reference Frame (ITRF).
• Supporting research on the coupling between Earth's core, mantle, and atmosphere through rotation observations.

Strengths

• Data originates from the authoritative International Earth Rotation and Reference Systems Service (IERS) Bulletin A.
• Produced by NASA's Jet Propulsion Laboratory, a leading center for space geodesy.
• Time series data with 1-day sampling provides regular observations of Earth orientation.

Limitations

• Specific column names, row counts, and file sizes are not provided by any source platform.
• The license is ambiguously listed as 'other-license-specified' without explicit terms.
• A metadata conflict exists where the 'last updated' date (2026-03-13) is in the future relative to the current date.

Provenance

Source

NASA Jet Propulsion Laboratory (JPL) Global Differential GPS Operations Centers, using IERS Bulletin A data.

Collection Method

Generated from GPS constellation observations as part of the GUARDIAN network.

Time Range

null

Freshness

2026-03-13 01:35:34.995762

Geography

Global