Objectives of the Emerging WAAS L5 ICD and Goals of the Corresponding WAAS L5 Signal

T.L McKendree

Abstract:	Over the latter half of this decade, GPS will deploy new satellites providing a new L5 civil GPS signal. In addition, WAAS will migrate to new replacement satellites, capable of providing an additional WAAS signal in the L5 band. The natural evolution is for a new WAAS signal on L5. In preparation, Working Group 2 (WAAS) of RTCA Special Committee 159 (GPS) launched in August 2002 an effort to develop an Interface Control Document (ICD) and receiver MOPS for GPS L5. The paper summarizes the objectives for that ICD. This paper then reviews a number of expected and possible goals for a WAAS L5 signal, identifying advantages, disadvantages and issues. These goals include the signal being compatible with GPS L5 receiver front-end, being compatible with LPV user on L5 only, providing integrity on inter-signal corrections, and permitting intelligent data-loading between L1 & L5 channels. A number of more speculative goals are also under consideration, and are also reviewed.
Published in:	Proceedings of the 2003 National Technical Meeting of The Institute of Navigation January 22 - 24, 2003 Disneyland Paradise Pier Hotel Anaheim, CA
Pages:	663 - 669
Cite this article:	McKendree, T.L, "Objectives of the Emerging WAAS L5 ICD and Goals of the Corresponding WAAS L5 Signal," Proceedings of the 2003 National Technical Meeting of The Institute of Navigation, Anaheim, CA, January 2003, pp. 663-669.
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