Interoperability Between Civil LAAS and Military JPALS Precision Approach and Landing Systems

T. Katanik, S. Simon, C. Bett, B. Driscoll, D. Tsamis, J. Flemming, R. Norwood and J. Barry

Abstract:	The Federal Aviation Administration and the Department of Defense are each developing GPS based precision approach and landing systems. These systems are known as the Local Area Augmentation System (LAAS) and the Joint Precision Approach and Landing System (JPALS), respectively. While each of these systems has unique requirements and architectural features dictated by their respective missions, a primary objective of JPALS is civil/military interoperability. This capability does not exist today due to the proliferation of legacy landing system technologies, but is essential to achieving the much more closely coupled civilian and military missions envisioned in the future. Civil LAAS equipped aircraft must be able to make adverse weather landings at JPALS equipped airfields when pressed into service for transporting military troops and cargo. Military JPALS equipped aircraft must also be able to operate into civil, LAAS equipped airfields. Raytheon Company has developed prototype LAAS equipment under a Government/Industry Partnership (GIP) with the FAA, and demonstration JPALS equipment under contracts with the U.S. Air Force . This paper presents the results of the first interoperability flight testing conducted between a military JPALS ground station and a civil LAAS equipped commercial aircraft. Testing was conducted at Holloman AFB using the Raytheon developed JPALS demonstration ground station, and a Rockwell-Collins civil Multimode Receiver (MMR) installed in a FedEx Express Boeing 727-200F aircraft. Testing results are presented, and include both quantitative data as well as subjective pilot comments on flyability. The paper also describes the similarities and differences in requirements and between JPALS and LAAS.
Published in:	Proceedings of the 14th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2001) September 11 - 14, 2001 Salt Palace Convention Center Salt Lake City, UT
Pages:	1179 - 1189
Cite this article:	Katanik, T., Simon, S., Bett, C., Driscoll, B., Tsamis, D., Flemming, J., Norwood, R., Barry, J., "Interoperability Between Civil LAAS and Military JPALS Precision Approach and Landing Systems," Proceedings of the 14th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2001), Salt Lake City, UT, September 2001, pp. 1179-1189.
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