GPS Block IIR Accuracy Verification

Harris Rawicz and Robert Smid

Abstract:	This paper presents the process used by ITT, the designer and manufacturer of the the Block IIR Navigation Payload, to assure that it meets the accuracy specifications, starting from the initial specification through the design phase, the production phase, the integration phase and finally the operational phase. Without the inherent accuracy of the GPS Block IIR satellites, the required accuracy of the actual and potential applications could not be assured. The paper is divided into three parts: the accuracy specification and design accuracy, the simulation accuracy and the acceptance test accuracy. One of the potential accuracy problems was the inherent logarithmic drift exhibited by the Rubidium Atomic Frequency Standard (RAFS). The measured performance of delivered RAFS was used in both single satellite simulation and constellation simulations to verify that the logarithmic drift will not significantly degrade the accuracy of the constellation. The simulation results demonstrate that the Block IIR satellite will provide a significant improvement over the existing GPS satellites.
Published in:	Proceedings of the 53rd Annual Meeting of The Institute of Navigation (1997) June 30 - 2, 1997 Albuquerque, NM
Pages:	377 - 385
Cite this article:	Rawicz, Harris, Smid, Robert, "GPS Block IIR Accuracy Verification," Proceedings of the 53rd Annual Meeting of The Institute of Navigation (1997), Albuquerque, NM, June 1997, pp. 377-385.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In