Utilizing a low Cost GPS Receiver for Centimeter to Sub-meter Accuracy Real-Time and Post-Processed Applications

Geraint Ffoulkes-Jones and Darren Cosandier

Abstract:	A high accuracy positioning system has been developed by combining a low cost single frequency C/A code GPS receiver with PC based processing software. The precise pseudorange and carrier phase observations output from a military specified navigation sensor, namely the NavSymm XR5M12, are used to produce results several orders of magnitude more accurate than the internally computed (2-3m CEP) DGPS solutions. The GPS software developed by Premier GPS Inc, offers several types of Kinematic GPS and Ambiguity Search processing algorithms suitable for a variety of applications, in either a real-time or a post-processing mode. This paper describes the observation techniques, data processing strategies, hardware and software required, and the results obtained for kinematic positioning in the 2&m, lo-30cm and sub-metre accuracy ranges. Results will be presented from both the real-time and post- processing systems. For example, a common problem in assessing the quality of real-time DGPS algorithms in kinematic trials is finding a more accurate truth. Kinematic GPS surveys performed in a manner to give 2- 5cm positions can provide a cheap and convenient solution to this problem. This facility is becoming increasingly important in industry as survey contractors are often asked to provide evidence that the positions and quality indicators output from their systems are actually accurate and reliable.
Published in:	Proceedings of the 8th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1995) September 12 - 15, 1995 Palm Springs, CA
Pages:	1499 - 1508
Cite this article:	Ffoulkes-Jones, Geraint, Cosandier, Darren, "Utilizing a low Cost GPS Receiver for Centimeter to Sub-meter Accuracy Real-Time and Post-Processed Applications," Proceedings of the 8th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1995), Palm Springs, CA, September 1995, pp. 1499-1508.
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