HA-NDGPS RTK Positioning as a Function of Baud Rate: 50 - 1000 bps

Benjamin W. Remondi, Kendall Ferguson and Michael Albright

Abstract:	The Federal Highway Administration and the United States Coast Guard have established two High Accuracy - Nationwide Differential GPS (HA-NDGPS) reference stations; one at Hagerstown, MD and the other at Hawk Run, PA. One primary goal is to demonstrate that decimeter level RTK can be achieved nationwide using existing NDGPS stations but broadcasting observations at new frequencies. The current experimental link frequencies are 454 kHz. (Hagerstown, MD) and 458 kHz. (Hawk Run, PA). Currently the link can be operated from 200 bps to 1000 bps, but that can be easily modified. This paper presents preliminary results using HA-NDGPS reference station broadcasts at different bit rates and distances. In all examples, presented here, the user operates at 1 Hz.; the results would be the same at higher user rates. Obviously, at the lower bit rates a reference station broadcasts observations less frequently than once per second.
Published in:	Proceedings of the 60th Annual Meeting of The Institute of Navigation (2004) June 7 - 9, 2004 Dayton Marriott Hotel Dayton, OH
Pages:	709 - 718
Cite this article:	Remondi, Benjamin W., Ferguson, Kendall, Albright, Michael, "HA-NDGPS RTK Positioning as a Function of Baud Rate: 50 - 1000 bps," Proceedings of the 60th Annual Meeting of The Institute of Navigation (2004), Dayton, OH, June 2004, pp. 709-718.
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