In Satellite Laser Ranging (SLR), a short pulse of coherent light generated by a laser (Light Amplification by Stimulated Emission of Radiation) is transmitted in a narrow beam to illuminate corner cube retroreflectors on the satellite. The return signal, typically a few photons, is collected by a telescope and the time-of-flight is measured. Using information about the satellite's orbit, the time-of-flight, and the speed of light, the location of the ranging station can be determined. Similar data acquired by another station, many kilometers distant from the first, or on a different continent, can be used to determine the distance between stations to precisions of centimeters or better. Repetitive measurements over months and years yield the change in distance, or the motion of the Earth's crust.
N: 90.0 S: -90.0 E: 180.0 W: -180.0
|Temporal Extent:||Platform(s):||ADEOS-1, ADEOS-2, AJISAI, ALOS, ANDE CASTOR, ANDE POLLUX, ANDE-RR ACTIVE, ANDE-RR PASSIVE, BE-C, BLITS, CHAMP, COMPASS-M1, CRYOSAT-1, CRYOSAT-2, DIADEM-1C, DIADEM-1D, ENVISAT, ERS-1, ERS-2, ETALON-1, ETALON-2, ETS-8, GEOS-1, GEOS-2, GEOS-3, GFO-1, GFZ-1, GIOVE-A, GIOVE-B, GLONASS, GOCE, GP-B, GPS-35, GPS-36, GRACE-A, GRACE-B, GROUND STATIONS, HY-2A, ICESAT-1, JASON-1, JASON-2, KOMPSAT-5, LAGEOS-1, LAGEOS-2, LARETS, LRE, LRO, METEOR 2-21, METEOR-2, METEOR-3, METEOR-3M, MSTI-2, OICETS, PROBA-2, QZS-1, RADIOASTRON, REFLECTOR, RESURS-01, SEASAT-1, SOHLA-1, STARLETTE, STARSHINE, STELLA, STSAT-2A, STSAT-2B, SUNSAT, TANDEM-X, TERRASAR-X, TIPS, TIPS-NORTON, TIPS-RALPH, TOPEX/POSEIDON, WESTPAC, ZEIA|
|Data Center(s):||CDDIS, Crustal Dynamics Data Information System||Instrument(s):||RETROREFLECTOR ARRAY, LASER RANGING STATION|
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|Project Short Name||Campaigns||Project Dates|
|ILRS||No campaigns listed.||No dates provided.|
|Coverage Type||Zone Identifier||Geometry||Granule Representation|
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NASA Goddard Space Flight Center, Code 690
Greenbelt, MD 20771
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