Special Methods for Using GPS in the Offshore Industry

A. R. Dennis

Abstract:	New methods of processing Global Positioning System (GPS) pseudorange measurements have been developed for offshore positioning control and quality assurance applications. Among other things, these new techniques greatly reduce sensitivity to GPS data errors over what is normally encountered in standalone hardware. The main attributes of these new techniques arc: Greatly improved GPS-derived accuracy; Reduced sensitivity to uncontrollable errors; Substantial increase in useful GPS coverage; Reduced requirements for data communication links; Integrity management of measurement errors; Self-adaptive error estimation in real time. This paper describes the theory behind this new GPS technology and how it is used in the Quality Control (QC) and Quality Assurance (QA) functions, mainly in the offshore industry where accuracy and reliability requirements are very stringent. These techniques have recently been incorporated into the QMA400 Navigation Quality Control System which has been developed by Astrodetics, Inc. (ADI) over the last few years to provide QC of radionavigation systems commonly used by the industry.
Published in:	Proceedings of the 2nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1989) September 27 - 29, 1989 The Broadmoor Hotel Colorado Spring, CO
Pages:	149 - 154
Cite this article:	Dennis, A. R., "Special Methods for Using GPS in the Offshore Industry," Proceedings of the 2nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1989), Colorado Spring, CO, September 1989, pp. 149-154.
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