Heuristic Weighting and Data Conditioning in the National Geodetic Survey Rapid Static GPS Software
Publication: Journal of Surveying Engineering
Volume 134, Issue 3
Abstract
NOAA’s National Geodetic Survey (NGS) has developed the Rapid Static GPS software for use as the major processing engine in the OPUS-RS utility (online positioning user service—rapid static) (http://www.ngs.noaa.gov/OPUS/OPUS-RS.html). The software was written specifically to support the computation of static positions from GPS tracking sessions as short as , while using reference station data from the NGS archive of continuously operating reference stations (CORS). When the reference stations are close to the user’s station, it is relatively easy to obtain an accurate solution. However, the CORS stations in the NGS archive are separated by or more in many areas of the country. In this situation, much care must be taken in conditioning the data sets and in selecting appropriate weights for the observations and constraints. This paper describes methods and weights that have been found to work well for most (but not quite all) data sets, and, therefore, can be used in an automated procedure such as OPUS-RS.
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Acknowledgments
The work described in this article was performed under contract to the National Geodetic Survey.
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Published In
Journal of Surveying Engineering
Volume 134 • Issue 3 • August 2008
Pages: 76 - 82
Copyright
© 2008 ASCE.
History
Received: Sep 5, 2007
Accepted: Dec 27, 2007
Published online: Aug 1, 2008
Published in print: Aug 2008
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