Digital Down Converter (DDC) H-Field Loran-C Navigation Receiver: Performance Analysis, Flight Test Update, and GPS/WAAS Integration

R. J. Hartnett, K. C. Gross, G. J. Czerwonka, H. H. Holland, M. Narins, C. A. Oates, G. Sanders, G. T. Gunther, K. U. Dykstra, and D. Larson

Abstract:	In this work we present an update on airborne Loran-C Hfield navigation sensor development at the U.S. Coast Guard Academy. This sensor offers significant advantages over more conventional E-field Loran-C receivers. More specifically, our receiver is an "all-inview," multi-chain receiver that is significantly less susceptible to precipitation static, hence it is a better candidate for integration with GPS or WAAS engines. First we provide a brief description of our newly developed Interactive Circuits and Systems (ICS) 650 Digital Down Converter based Loran-C H-field sensor. Second, we summarize some of the flight test results from our summer 2001 flights on the Federal Aviation Administration Technical Center (FAATC) Convair 580 and Ohio University’s Beechcraft King Air. Using the test data from our “all-in-view” receiver, we discuss our promising results in terms of availability, accuracy, integrity, and continuity, for enroute and approach phases of several flights. Finally, we discuss ongoing Federal Aviation Administration (FAA) sponsored work to improve receiver performance, and we describe our Kalman filter approach in integrating Loran-C, GPS, and WAAS information.
Published in:	Proceedings of the 2002 National Technical Meeting of The Institute of Navigation January 28 - 30, 2002 The Catamaran Resort Hotel San Diego, CA
Pages:	428 - 438
Cite this article:	Hartnett, R. J., Gross, K. C., Czerwonka, G. J., Holland, H. H., Narins, M., Oates, C. A., Sanders, G., Gunther, G. T., Dykstra, K. U., Larson, D., "Digital Down Converter (DDC) H-Field Loran-C Navigation Receiver: Performance Analysis, Flight Test Update, and GPS/WAAS Integration," Proceedings of the 2002 National Technical Meeting of The Institute of Navigation, San Diego, CA, January 2002, pp. 428-438.
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