Earthquake Research Yields Manhour-Efficient Point with Millimeter Precision

Andrea Donnellan, Kenneth Hurst, Carl Carter and Patricia Romanowski

Abstract:	This paper presents a review of the methodology used to perform high-precision geodetic observations in the Southern California seismic survey areas. Surveys to millimeter-level precision can be performed much more quickly than before due to the availability of very low noise receivers, a network of well-established fixed receivers, and powerful post-processing software. The highly active Southern California region is constantly monitored using fixed and portable dual frequency GPS receivers occupying numerous sites. A demonstration of the speed and accuracy of the methodology is illustrated by results from surveys performed immediately after the January earthquake in Northridge, CA, using TurboRogue GPS receivers. In the five days following the temblor, rapid surveys were performed at ten sites, with horizontal results reproducible to 1.5 mm.
Published in:	Proceedings of the 7th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1994) September 20 - 23, 1994 Salt Palace Convention Center Salt Lake City, UT
Pages:	375 - 381
Cite this article:	Donnellan, Andrea, Hurst, Kenneth, Carter, Carl, Romanowski, Patricia, "Earthquake Research Yields Manhour-Efficient Point with Millimeter Precision," Proceedings of the 7th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1994), Salt Lake City, UT, September 1994, pp. 375-381.
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