Rapid Static Surveying with an Operational GPS System

John M. Nolan, Iain R. Webster, Sergei A. Gourevitch, and Jonathan W. Ladd

Abstract:	The GPS system is expected to become fully operational before the end of 1993. To the survey community, interested in economic and efficient measurement techniques, this has several ramifications. First, survey methods such as “Rapid Static” and “Kinematic” techniques will be assisted due to the increased number of satellites that we are now becoming accustomed to. To partially offset this advantage, the introduction of Anti-Spoofing (AS) will make the quality of the L2 code and carrier measurements much less reliable. It should be emphasized, that for small scale engineering and cadastral applications, the use of the L2 measurements is essential if sub centimeter results are required in short, economic time frames. There are several methods to obtain code and carrier measurements in the presence of AS. Ashtech has developed and patented a proprietary technique called Z-TrackingTM which produces “pure” high quality code and full wavelength carrier phase measurements in the presence of As. This paper looks at the results of rapid static tests using Z data with a near operational GPS system. Emphasis is given to the problem of reducing occupation times for local a surveys.
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:	1039 - 1047
Cite this article:	Nolan, John M., Webster, Iain R., Gourevitch, Sergei A., Ladd, Jonathan W., "Rapid Static Surveying with an Operational GPS System," 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. 1039-1047.
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