Satellite Laser Ranging Data for Geodetic and Geophysical Analysis

Daily and monthly ground-based Satellite Laser Ranging observation files from the NASA Crustal Dynamics Data Information System provide millimeter-precision range measurements to satellites with retroreflectors. The data, gathered by a global network of stations, supports the International Laser Ranging Service for producing precise station positions, satellite orbits, and geophysical parameters. It is available in ILRS and Consolidated Ranging Data formats.

Use Cases

• Precise orbit determination for spaceborne radar altimeter missions using unambiguous range measurements.
• Monitoring millimeter-level variations in Earth's center of mass and station positions for geodynamic studies.
• Contributing to the International Terrestrial Reference Frame by analyzing time histories of station position and motion.
• Modeling spatial and temporal variations of Earth's gravitational field from aggregated global network data.
• Conducting tests of General Relativity and enabling sub-nanosecond global time transfer.

Strengths

• Provides unambiguous range measurements with millimeter precision, a unique capability among space geodetic techniques.
• Data is aggregated from a global network of stations, enabling high-accuracy satellite orbits and geophysical parameter estimation.
• Serves the International Laser Ranging Service, indicating its role as a foundational dataset for the geodetic community.

Limitations

• Specific row counts, file sizes, and column names are not provided by any source, limiting detailed technical assessment.
• Sources conflict on temporal granularity, with one describing monthly files and others describing daily 24-hour files.
• License information is inconsistent, with one source specifying 'other-license-specified' and others listing null.

Provenance

Source

NASA Crustal Dynamics Data Information System (CDDIS)

Collection Method

Ground-based laser ranging observations collected from a global network of stations tracking satellites equipped with retroreflectors.

Time Range

null

Freshness

2026-03-13 20:27:25.182953

Geography

Global network of satellite laser ranging stations.