Gravity Probe B GPS Receivers

P. Shestople, J. Li, A. Ndili and K. Schrock

Abstract:	The Gravity Probe B spacecraft was successfully launched at 9:57:24 PDT on April 20, 2004. A pair of Trimble TANS Vector III receivers installed on the vehicle have provided precision position, velocity, and time measurements of the Gravity Probe B satellite. This paper will discuss the purpose of the Global Positioning System subsystem on the Gravity Probe B vehicle, software and hardware modifications to the original GPS equipment, environmental testing completed prior to launch as well as the results of that testing, and conclude with preliminary on-orbit results.
Published in:	Proceedings of the 17th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2004) September 21 - 24, 2004 Long Beach Convention Center Long Beach, CA
Pages:	2676 - 2681
Cite this article:	Shestople, P., Li, J., Ndili, A., Schrock, K., "Gravity Probe B GPS Receivers," Proceedings of the 17th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2004), Long Beach, CA, September 2004, pp. 2676-2681.
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