Multi-mode DGNSS Precision Landing System Receiver Flight Trials

David Meyers, Christopher Langone, Don Johnson, Andrew Hunton and Ronnie Kanagawa

Abstract:	The Air Force, GEC-Marconi, and ARINC demonstrated a landing system receiver that incorporates FM protected Instrument Landing System (lLS), Microwave Landing System (MLS), and Differential Global Positioning System (DGPS) capabilities in a single line replaceable unit. This multi-mode receiver (MMR) was developed from a dual band receiver (ILS/MLS) designed for military tactical and transport aircraft. The DGPS mode was integrated by adding a P-code GPS receiver (operating in a C/A-code mode) that receives DGPS corrections conforming to RTCA/DO-217, Appendix F, using the ILS localizer as the data link. This approach minimizes aircraft integration costs. The MMR accuracy and flyability were verified by conducting precision approach testing on a Sikorsky S-76 helicopter and on an Air Force C-13X (Boeing 707). Local area DGPS corrections were provided by a prototype Special Category I (SCAT) system and MLS signals were provided by FAA fixed base installation and a USAF Mobile Microwave Landing System (MMLS). Precision approach testing at two different sites verified MMR Category I accuracy in all three landing system modes. MMR performance statistics are presented at the decision height and along the approach path. System flyability using a subjective pilot scale showed excellent results in each mode.
Published in:	Proceedings of the 1996 National Technical Meeting of The Institute of Navigation January 22 - 24, 1996 Loews Santa Monica Hotel Santa Monica, CA
Pages:	177 - 186
Cite this article:	Meyers, David, Langone, Christopher, Johnson, Don, Hunton, Andrew, Kanagawa, Ronnie, "Multi-mode DGNSS Precision Landing System Receiver Flight Trials," Proceedings of the 1996 National Technical Meeting of The Institute of Navigation, Santa Monica, CA, January 1996, pp. 177-186.
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