Architecture Options for GPS/Carousel IV Integration

Barry E. Griffiths, Samuel K. George, Jay S. Cooper, Robert G. McCarron

Abstract:	The U.S. Air Force wishes to integrate the Global Positioning System (GPS) Phase III receiver with the existing navigation systems of a number of aircraft. A number of aircraft types, including the. C-141, C-5, and the C-135 family (C-135, KC-135, RC-135, etc. ) have navigation systems that are based on the Delco carousel IV-E inertial navigation equipment (INE) Figure 1-1 (Ref. 1). The Air Force inventory includes approximately 3000 physically identical Carousel IV-E INE's, suggesting that a common integration satisfying the requirements of all Carousel IV-E users could significantly reduce development and logistics costs below that which would be expected for individual GPS integrations. This paper presents interim results of an effort to define such an integration architecture. The ground rules for defining a GPS/ integration architecture are as follows: • All existing navigation capabilities are to be retained • In the event of a GPS failure or no GPS installed, the navigation system should revert to a mode with accuracy no worse than the current system • Physical modifications to the INE or to the aircraft are to be minimized • Physical modifications to the INE must be common across all aircraft types • Software modifications to the INE should be done in a cost-effective way; if possible, a unified software version should be created that can be used on all aircraft types • Software modifications to the GPS Phase III receiver are possible, but not necessarily encouraged (Ref. 2.).
Published in:	Proceedings of the International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1988) September 19 - 23, 1988 The Broadmoor Hotel Colorado Spring, CO
Pages:	309 - 317
Cite this article:	Griffiths, Barry E., George, Samuel K., Cooper, Jay S., McCarron, Robert G., "Architecture Options for GPS/Carousel IV Integration," Proceedings of the International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1988), Colorado Spring, CO, September 1988, pp. 309-317.
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