Loran-C Latitude-Longitude Conversion at Sea: Programming Considerations

James R. McCullough, Barry J. Irwin, Robert M. Bowles

Abstract:	To aid programmers of LORAN-e latitude longitude conversion, we: o Provide reference to the literature. o Compare digital "processing-noise" for several arc-length methods . o Discuss some practical aspects of overland signal propagation ( ASF) modeling for offshore navigation . Comparisons are made of the precision of arclength routines as computer precision is reduced. Overland propagation delays (ASF's) are discussed and illustrated with observations from offshore New England. Present practice of LORAN-C error budget modeling is then reviewed with the suggestion that additional terms be considered in future modeling . Finally, some detailed numeric examples are provided to help with new computer program checkout.
Published in:	Proceedings of the 1985 National Technical Meeting of The Institute of Navigation January 15 - 17, 1985 San Diego, CA
Pages:	127 - 153
Cite this article:	McCullough, James R., Irwin, Barry J., Bowles, Robert M., "Loran-C Latitude-Longitude Conversion at Sea: Programming Considerations," Proceedings of the 1985 National Technical Meeting of The Institute of Navigation, San Diego, CA, January 1985, pp. 127-153.
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