Captive Carry Flight Test of a GPS and Radar Aided Inertial Navigation System

Renato S. Ornedo, Victor Estrada, Marc Amar, Paul Huynh, Gurpartap S. Sandhoo

Abstract:	This paper describes a recent joint test conducted to collect data for the verification of system error models for a Global Positioning System (GPS) and radar measurement aided inertial navigation system. In the tactical application, a missile equipped with such navigation system will be used to intercept an incoming target. A ship-based radar system tracks both the missile and target and uplinks the track information to the missile. The success of the mission depends on the missile navigation accuracy and the removal of alignment error between the missile and radar tracking system. The missile on-board inertial navigation system implements a Kalman filter to determine in-flight corrections to the navigation and alignment errors. The test described in this paper involves the use of an aircraft to simulate missile in-flight dynamics. A ship-based radar system tracks the aircraft as it circles and flies over the ship. The aircraft carries a test station that hosts a version of the aforementioned navigation system. The aircraft data and the ship-based radar system data are collected independently for post-flight analyses. The paper describes the detailed test scenarios to meet the test objective. The use of differential GPS-based scoring systems and high accuracy embedded GPS inertial navigation system to provide reference measurements during the test is discussed. The paper presents results of the analytical verification of the system error models. It also provides preliminary performance from a real-time test of the navigation system using inertial measurement unit (IMU) and GPS data.
Published in:	Proceedings of the 11th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1998) September 15 - 18, 1998 Nashville, TN
Pages:	601 - 609
Cite this article:	Ornedo, Renato S., Estrada, Victor, Amar, Marc, Huynh, Paul, Sandhoo, Gurpartap S., "Captive Carry Flight Test of a GPS and Radar Aided Inertial Navigation System," Proceedings of the 11th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1998), Nashville, TN, September 1998, pp. 601-609.
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