studies to determine the ranging accuracy of the laser systems at nasa goddard space flight center have employed both long-arc orbital comparison, using optical and doppler observations of geos-i, and predicted trajectory comparison. the long-arc technique compares the ranges measured by the laser with those predicted by a reference orbit computed without using laser data. the second methode, utilizing computed trajectory comparisons, adds laser measurements to an orbital9solution to demonstrate the improvement from these data in predicting the positiion of a spacecraft. the pulsed-laser systems have a range accuracy of approximately 2 m, and the range noise is generally less than 1.5m when measuring at nearearth satellite distances (1000-3500 km). early results from laser ranging in daeylight show range measurements with no appreciable increase in noise over nighttime operations.
performance of the nasa laser ranging system in satellite tracking
1971
, 7 Bilder, 3 Tabellen, 16 Quellen
Aufsatz (Zeitschrift)
Englisch
NASA Satellite Laser Ranging Network
NTRS | 2004
|Evaluation of DoD GPS Satellite Orbits Using NASA Laser Ranging Data
British Library Conference Proceedings | 1995
|Performance of NASA laser ranging systems during MERIT
NTRS | 1986
|