Aircraft Experiences With a Hybrid Loran-GPS

Ralph Eschenbach, Mark Morgenthaler

Abstract:	During the past two years, we have been using a Trimble 10X Series IV in day-to-day navigation in a Beechcraft Bonanza Model S-35. It has been an invaluable aid in learning about the capabilities of the hybrid system as well as trying our new features and options. The 10X Series IV contains both a two channel, sequencing GPS receiver, and an all digital LORAN. The GPS receiver has been described in previous papers, and will only be summarized here: the LORAN is new and will be described in this paper. In particular, the LORAN uses a DSP (Digital Signal Processor) and virtually all of the filtering and signal enhancing is done in software. This allows much better performance in the presence of jamming and cross rate interference. In this paper we will first discuss the current capabilities and features of the 10X with emphasis on the new digital LORAN. Although designed as a marine product, many of the requirements of the aircraft market are similar. Second, we will present data showing performance under several different circumstances including both static and dynamic performance. Third, we will discuss future enhancements and capabilities with emphasis on the hybrid combination.
Published in:	Proceedings of the 44th Annual Meeting of The Institute of Navigation (1988) June 21 - 23, 1988 U.S. Naval Academy Annapolis, Maryland
Pages:	93 - 100
Cite this article:	Eschenbach, Ralph, Morgenthaler, Mark, "Aircraft Experiences With a Hybrid Loran-GPS," Proceedings of the 44th Annual Meeting of The Institute of Navigation (1988), Annapolis, Maryland, June 1988, pp. 93-100.
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