GPS Processing Using Online Services
Publication: Journal of Surveying Engineering
Volume 134, Issue 4
Abstract
Online global positioning system (GPS) processing services have provided users with the opportunity to obtain freely high precision coordinates in a recognized datum. However, all services are dependent on the quality of the data and the length of data span supplied to them by the user. This study aims to assess the four globally available online GPS processing services from the point of view of a user wishing to take advantage of such a service for datum realization. Data from eight selected international GNSS service stations have been processed by each service and the results have allowed a statistically significant comparison analysis to be performed. Although users can expect a variability of results from different services when processing identical data, solutions with data are generally repeatable at the level and accurate in terms of international terrestrial reference frame coordinate recovery at the level. Such differences are accentuated as observation time decreases. Finally, postprocessing kinematic data, currently performed by only one online service, is a valid option for users provided they ensure data quality.
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Acknowledgments
The help of Mr. S. Adamos, former student from the National Technical University of Athens, in data processing, and of Dr. M. Stewart from Curtin University of Technology, in data analysis, is greatly acknowledged.
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Information & Authors
Information
Published In
Journal of Surveying Engineering
Volume 134 • Issue 4 • November 2008
Pages: 115 - 125
Copyright
© 2008 ASCE.
History
Received: Jul 30, 2007
Accepted: Jan 24, 2008
Published online: Nov 1, 2008
Published in print: Nov 2008
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