GPS/PLRS Aided Inertial Land Navigation System Performance

Sam C. Bose

Abstract:	Harsh battlefield environments impose stringent requirements on military land navigation systems. Self-contained inertial navigation systems are immune from electromagnetic interference but suffer from unbounded error- growth. Externally referenced radio based systems such as the Global Positioning System (GPS) and the Position Location Reporting System (PLRS) do not suffer from unbounded error growth but are vulnerable to jamming or destruction of the transmitting device. They are also subject to terrain masking and, in the case of active systems, they make it easier for the enemy to locate the system. Hybridization of the self-contained inertial systems with GPS and/or PLRS offer the potential of incorporating the major advantages of each system while eliminating most of the deficiencies .of the individual systems. This paper presents the results of a detailed simulation study to examine the performance of various combinations of GPS and PLRS with inertial sensors. Both strapdown and gimballed technology is investigated. The inertial sensor-s range in quality from high to medium to low corresponding roughly to a 1 nm/hr, 10 nm/hr or 100 nm/hr open loop (free-inertial) navigator respectively. The simulations contain a highly realistic vehicle and satellite profile generation, along with extensive real world errors controlled by a 24-state Kalman filter in both clear and jammed environments.
Published in:	Proceedings of the 42nd Annual Meeting of The Institute of Navigation (1986) June 24 - 26, 1986 Seattle, Washington
Pages:	111 - 119
Cite this article:	Bose, Sam C., "GPS/PLRS Aided Inertial Land Navigation System Performance," Proceedings of the 42nd Annual Meeting of The Institute of Navigation (1986), Seattle, Washington, June 1986, pp. 111-119.
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