ARINC Veracious Differential Reference Station (AVDRS) Development for Dallas/Fort Worth Trials

Donald E. Johnson and Mark A. Euhus

Abstract:	This paper provides an update on current AVDRS development/testing activities and presents initial test results for a specific AVDRS application at the Dallas/Fort Worth (DFW) International Airport. The overall purpose for the DFW Terminal Instrument Support System (TISS) Trials is to develop veracious GPS differential corrections and broadcast these corrections to aircraft in the DFW area. These corrections will be received by modified American Airlines and United Airlines test aircraft (B757 and B767, respectively) and used to perform non-precision approaches to DFW. The DFW trials are significant because they represent an initial operational evaluation of differential GPS (DGPS) by airline pilots for the approach phase of flight. In the DFW trials application, the integrity of the DGPS corrections and the communications links are being demonstrated in a quasi-operational environment using modified (test configured) airline aircraft. The inputs to the Two-Sided (2s) AVDRS developed for the DFW Trials are provided by commercial-off-the shelf DGPS reference stations produced by two different manufacturers and the “RTCM SC-104 like” output is transmitted via a standard Aircraft Communications Addressing and Reporting System (ACARS) VHF data link to the aircraft. The GPS differential receiver integrated into each test aircraft uses these RTCM SC-104 like corrections to determine the aircraft position. The paper presents examples of the AVDRS development and test data, the RTCM SC-104 like AVDRS output format, development configurations, and AVDRS development activities for 1993.
Published in:	Proceedings of the 6th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1993) September 22 - 24, 1993 Salt Palace Convention Center Salt Lake City, UT
Pages:	1469 - 1477
Cite this article:	Johnson, Donald E., Euhus, Mark A., "ARINC Veracious Differential Reference Station (AVDRS) Development for Dallas/Fort Worth Trials," Proceedings of the 6th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1993), Salt Lake City, UT, September 1993, pp. 1469-1477.
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