Satellite Laser Ranging (SLR) and Lunar Laser Ranging (LLR) use short-pulse lasers and state-of-the-art optical receivers and timing electronics to measure the two-way time of flight (and hence distance) from ground stations to retroreflector arrays on Earth orbiting satellites and the Moon.

SLR is an accurate technique for determining the geocentric position of an Earth satellite, allowing for the precise calibration of radar altimeters and separation of long-term instrumentation drift from secular changes in ocean topography.

Satellite laser ranging (SLR) is a method to measure the distance to satellites in a geocentric orbit. It consists of an astronomical observatory equipped with a laser that sends ultrashort pulses of light .

Dec 12, 2018 · SLR is the most accurate technique currently available to determine the geocentric orbit of an Earth satellite, allowing for the precise calibration of radar altimeters and separation of long-term instrumentation drift from secular changes in ocean topography.

Mar 31, 2020 · SLR is an accurate technique for determining the geocentric position of an Earth satellite, allowing for the precise calibration of radar altimeters and separation of long-term instrumentation drift from secular changes in ocean topography.

Nov 1, 2020 · The CDDIS serves as a global data center for the International Laser Ranging Service (ILRS). ILRS Operations Centers interface to SLR stations, collecting, validating, and merging data from selected stations.

6 days ago · For almost 50 years, satellite laser ranging (SLR) tracking measurements have been used to monitor very large-scale changes in Earth’s gravity field. The largest and longest observed component of the time variable gravity field is the dynamic oblateness, described by the spherical harmonic coefficient C 20 , or its unnormalized form, J 2 ...

For over 40 years, NASA's global network of satellite laser ranging (SLR) stations has provided a significant percentage of the global orbital data used to define the International Terrestrial Reference Frame (ITRF). The current NASA legacy network is reaching its end-of-life and a new generation of systems must be ready to take its place.

Jun 16, 2022 · The Crustal Dynamics Data Information System (CDDIS) continues to support the space geodesy and geodynamics community through NASA's Space Geodesy Project as well as NASA's Earth Science Enterprise.

In Satellite Laser Ranging (SLR) a global network of stations measure the instantaneous round trip time of flight of ultrashort pulses of light to satellites equipped with special reflectors.