Magnetic Loop Based LORAN Receiver for Urban Canyon Applications

Benjamin B. Peterson, Michael McKaughan, Shannon Heye, Jose Mendoza, David Leone, Lance C. Miller, Yukie Novick and Kenneth U. Dykstra

Abstract:	During the summer of 1996, the Office of National Drug Control Policy, the British Home Office, and the Defense Advanced Research Projects Agency funded the development of a digital H-field LORAN receiver and joint United States / United Kingdom radionavigation experiments to determine the accuracy, repeatability, and availability of LORAN in urban locations. The data measured in this experiment were taken using an H-field LORAN receiver. This decision was made based upon the results of an experiment performed in New York City during the summer of 1994 where it was determined that H-field LORAN significantly outperforms E-field LORAN in an urban environment. Details will be presented of the USCGA developed all digital H-field LORAN receiver that accepts a precise oscillator input to produce a two station time-of-arrival (TOA) fix if three stations are not available. In addition, the results of extensive LORAN, GPS, and GPSGLONASS testing in urban canyons will be presented. The first experiments were performed in London utilizing a van supplied by the United Kingdom and outfitted by a joint U.S. / U.K. team. Ground truth to an accuracy of one meter circular error probability was obtained via a combination of frequent stops at precisely surveyed locations and post processing of inertial navigator data. The London data collected over a two week period indicated the LORAN receiver could consistently provide fixes with accuracy comparable to GPS SPS. The second set of experiments were performed in the New York City area utilizing a van supplied by ISRC and outfitted by USCGA, SAIC, and ISRC personnel. The New York data collected over a two week period also indicated the receiver could consistently correctly acquire and provide fixes of accuracy comparable to GPS SPS.
Published in:	Proceedings of the 1997 National Technical Meeting of The Institute of Navigation January 14 - 16, 1997 Loews Santa Monica Hotel Santa Monica, CA
Pages:	551 - 561
Cite this article:	Peterson, Benjamin B., McKaughan, Michael, Heye, Shannon, Mendoza, Jose, Leone, David, Miller, Lance C., Novick, Yukie, Dykstra, Kenneth U., "Magnetic Loop Based LORAN Receiver for Urban Canyon Applications," Proceedings of the 1997 National Technical Meeting of The Institute of Navigation, Santa Monica, CA, January 1997, pp. 551-561.
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