Satellite Laser Ranging Earth Orientation and Station Position Products

Satellite Laser Ranging (SLR) data from the International Laser Ranging Service (ILRS) is used to generate official Earth Orientation Parameters and station positions. These combined daily and weekly products are derived from analysis center solutions coordinated by NASA. They provide precise measurements critical for understanding Earth's rotation and geodetic reference frames.

Use Cases

• Monitoring Earth's rotation (polar motion, length of day) based on derived Earth Orientation Parameters.
• Establishing and maintaining the International Terrestrial Reference Frame based on precise station positions.
• Analyzing crustal deformation and tectonic plate motion based on time-series station coordinate solutions.
• Validating and combining solutions from different analysis centers for the official ILRS product.

Strengths

• Data is the official combined product of the International Laser Ranging Service (ILRS), indicating authoritative provenance.
• Products are generated daily and weekly, suggesting a high temporal resolution for monitoring Earth orientation.
• Dataset is hosted on multiple platforms (Data.gov, NASA Earthdata), indicating recognized importance and reliability.

Limitations

• Column names and detailed schema are unknown across all sources, limiting immediate usability.
• Key metadata like row count, file size, and specific license details are missing or conflict ('other-license-specified' vs 'None').
• The listed last update date (2026-04-09) is in the future, casting doubt on metadata accuracy.

Provenance

Source

International Laser Ranging Service (ILRS) analysis centers, combined by the ILRS analysis coordinator.

Collection Method

Derived from analysis of Satellite Laser Ranging (SLR) data.

Time Range

Daily and weekly solutions.

Freshness

2026-04-09 22:33:26.324880 (Note: This date is in the future and may be erroneous.)

Geography

Global, based on SLR station network positions.