Architectures for Combined Standard Positioning System/Precise Positioning System User Equipment

D.A. Stratton

Abstract:	This paper compares approaches to provide civilcompliant navigation capabilities for military aircraft. Three major alternatives to capture the expanding civil and military requirement base are: federated, switchable, and integrated SPS/PPS solutions. Federated architectures consisting of separate military and civil receivers are used where independent certification and development paths are of greatest concern. Where size, weight and power are more important, receiver functions need to be more tightly integrated, and therefore the allocation of requirements within the integrated design has a greater impact on the ability to meet performance, safety, and security requirements. Current generation user equipment incorporating Precise Positioning Service (PPS) and Standard Positioning Service (SPS) is designed around the approach of a civil certified software partition within a PPS receiver that is serially switched upon a manual selection by the pilot. Another alternative presented here is to incorporate parallel PPS and SPS functions within an integrated receiver so that civil safety and military security requirements are provided simultaneously to the host platform. This paper explores the trade space between these three alternatives.
Published in:	Proceedings of the 19th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2006) September 26 - 29, 2006 Fort Worth Convention Center Fort Worth, TX
Pages:	3043 - 3049
Cite this article:	Stratton, D.A., "Architectures for Combined Standard Positioning System/Precise Positioning System User Equipment," Proceedings of the 19th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2006), Fort Worth, TX, September 2006, pp. 3043-3049.
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