Military Pseudolite Flight Test Results

Jeffrey L. Tuohino, Michael G. Farley and Robert R. James

Abstract:	Rockwell Collins has developed a PseudoLite (PL) based Battlefield Navigation System (BNS) in partnership with DARPA, UAV Battlelab (Eglin AFB, FL.), and SSC San Diego. This paper presents test results from pseudolite field-testing conducted in Cedar Rapids, IA and Ft. Huachuca, AZ. A local constellation of multiple airborne pseudolites provides a higher power navigation signal that can be tracked by GPS receivers being jammed by enemy forces. The BNS utilizes a unique ephemeris data design while retaining the 50 Hz data structure and describes precise pseudolite position information while the host platform is moving and maneuvering. The APL was hosted on a Rockwell Collins experimental aircraft and on a TRW Hunter UAV. Software only modifications were made to the PLGR and JDAM GPS receivers, and this allowed the GPS receivers to navigate using the new pseudolite ephemeris. Each pseudolite uses GPS as an independent time reference. Several advances in time transfer were developed and resulted in an overall system timing error on the order of 5 nanoseconds or less. The system demonstrated 10m navigation accuracy in the presence of severe GPS jamming.
Published in:	Proceedings of the 13th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2000) September 19 - 22, 2000 Salt Palace Convention Center Salt Lake City, UT
Pages:	2079 - 2088
Cite this article:	Tuohino, Jeffrey L., Farley, Michael G., James, Robert R., "Military Pseudolite Flight Test Results," Proceedings of the 13th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2000), Salt Lake City, UT, September 2000, pp. 2079-2088.
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