ILRS SLR Data Handling File: ITRF2020 Model Extensions

Satellite Laser Ranging data corrections integrate results from multiple international projects, including the ILRS Station Systematic Error Monitoring project and its 2023 extension. The dataset distinguishes between mobile systems, which have measured eccentricities from ground monuments, and permanent systems, whose optical axes define the reference point. It supports the extension of the International Terrestrial Reference Frame 2020 with additional tracking sites.

Use Cases

• Applying eccentricity corrections to SLR tracking data based on monument and system type.
• Extending the ITRF2020 terrestrial reference frame model with additional SLR station coordinates.
• Monitoring and correcting systematic errors in ILRS station measurements using SSEM project results.
• Referencing mobile SLR system positions to physical ground monuments via assigned CDP and DOMES numbers.

Strengths

• Incorporates results from multiple authoritative projects, including the ILRS/ASC AWG meetings and the SSEM project.
• Provides a clear distinction between mobile and permanent system reference points, a critical detail for high-precision geodesy.
• Maintained by a major space agency (NASA), indicating institutional support.

Limitations

• Key metadata such as column names, row counts, and file sizes are unknown across all sources.
• The license is ambiguously specified as 'other-license-specified' on one platform and absent on another.
• Descriptions are highly technical but lack concrete details on the data's structure and accessibility.

Provenance

Source

National Aeronautics and Space Administration (NASA), International Laser Ranging Service (ILRS).

Collection Method

Likely compiled from corrections to tracking data, project resolutions, and systematic error monitoring results.

Time Range

References data from at least July 2008 to December 2017 (T2L2 project) and a 2023 project extension.

Freshness

Last updated on 2026-04-09 according to datagov entries.

Geography

Global, covering the International Laser Ranging Service (ILRS) network sites.