Performance of Integrated Electro-Optical Navigation Systems

T. Hoshizaki, D. Andrisani II, A. Braun, A. Mulyana, J. Bethel

Abstract:	Performance analyses are made for the new airborne tightly integrated INS (Inertial Navigation System) / GPS (Global Positioning System) / EO (Electro-Optical imaging system) navigation system in which aircraft states, sensor biases, and unknown ground object coordinates are estimated simultaneously by a single Kalman filter. These analyses are done by: 1. comparing the new navigation system with existing tightly integrated INS/GPS navigation systems; 2. changing INS and GPS performance to see the dependency of integrated system's performance on individual sensor performance; 3. investigating the capability of focusing on known ground objects (control points). The simulation results show that: 1. aircraft yaw angle determination (a weak point common in INS/GPS systems) is greatly improved by focusing on an unknown ground object with the INS/GPS/EO system; 2. GPS performance has effects on aircraft position, velocity, and orientation determination accuracy, while INS performance has effects only on aircraft orientation determination accuracy; 3. focusing on a control point results in (1) better navigation accuracy than focusing on an unknown ground object, and (2) possibility of using control points as an alternative to GPS.
Published in:	Proceedings of the 16th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS/GNSS 2003) September 9 - 12, 2003 Oregon Convention Center Portland, OR
Pages:	520 - 531
Cite this article:	Updated citation: Published in NAVIGATION: Journal of the Institute of Navigation
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