A GPS Carrier Phase Processor for Real-Time High Dynamics Tracking

Jim Sennott and Dave Senffner

Abstract:	error budgets on navigation. Validation is both challenging and expensive. While existing carrier phase RTK truth systems are capable of decimeter performance, they fail in realistic high dynamics maneuvers with blockages. In order to achieve robust carrier phase tracking aboard range test pods and other vehicles, a powerful adaptive filter structure was developed for enhancing phase tracking functions of existing and future receivers. The technique optimally processes raw correlator data obtained prior to receiver tracking loops. Test pod blockage and dynamics models were developed and used to analyze reception profiles recorded in actual aircraft flight tests. These profiles were used to drive a 200 Hz model of the GPS receiver’s correlator bank and IMU, permitting closed loop simulation of the enhanced tracking functions. Phase navigation simulations were carried out with single and multiple antennas, with and without IMU, in figure-8 dive, and aileron roll maneuvers, to 18 g’s. The optimal combining of dual antennas mitigated satellite block- ages. Stability of the tightly coupled GPS/IMU integration was demonstrated.
Published in:	Proceedings of the 53rd Annual Meeting of The Institute of Navigation (1997) June 30 - 2, 1997 Albuquerque, NM
Pages:	299 - 308
Cite this article:	Sennott, Jim, Senffner, Dave, "A GPS Carrier Phase Processor for Real-Time High Dynamics Tracking," Proceedings of the 53rd Annual Meeting of The Institute of Navigation (1997), Albuquerque, NM, June 1997, pp. 299-308.
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