In GPS one of the primary errors contributing to positioning inaccuracy is the performance of the on-board atomic clock. To determine and predict the performance of this atomic clock has been a problem due to the ambiguity of the orbital position error and clock uncertainty in the Radio Frequency (RF) tracking of the navigation signals. The Laser Retroreflector Experiment (LRE) on-board NAVSTAR 35 and 36 provides a means of separating these ambiguous errors by enabling highly precise and accurate satellite positions to be determined independently of the RF signals. The results of examining onboard clock behavior after removing the orbital position signatures will be discussed. GPS RF tracking data from various DOD and other sites are used to reconstruct the onboard clock data and examine the clock behavior. From these data, the effects of clock performance on GPS positioning performance can examined.
Laser Retroreflector Experiment on NAVSSTAR35 and 36
1995
15 pages
Report
No indication
English
Optics & Lasers , Atomic clocks , Global positioning system , Laser arrays , Laser ranger/tracker , Navstar satellites , Position errors , Radio navigation , Radio tracking , Retroreflectors , Interorbital trajectories , Navigation aids , Orbital position estimation , Phase shift , Radio frequencies , Satellite tracking
Laser retroreflector experiment on NAVSTAR 35 and 36
NTRS | 1995
|Laser Retroreflector Experiment on NAVSTAR 35 and 36
British Library Conference Proceedings | 1995
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