British Geological Survey, NERC: Herstmonceux Geodetic Observatory - Satellite Ranging Facility
20 Nov 2018






Laser beam directed skywardSatellite Laser Ranging facility. Tracking telescope for obtaining laser distance measurements day and night to orbiting satellites that carry the necessary retro-reflectors. Single-shot range precision about 3mm at distances of from 300km to 40,000km. The system can also measure brightness of satellites at night and record astrometric positions for low-orbiting satellites. A further telescope is used for nighttime astrometric observations of satellites in geosynchronous orbits. ​