Article

Research on a Positioning Application by RTK Technique and with goGPS

Authors:
Jun Wen Xu
Jun Wen Xu
Jun Wen Xu
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Guo Wen He
Guo Wen He
Guo Wen He
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Abstract

This paper describes research in the use of goGPS to develop positioning applications.. This paper introduces the structure of goGPS library and describes the implementation of algorithms in our library. goGPS is an open source software that can achieve accuracies of less than 1 m, depending on sky visibility conditions, using low-cost GPS instrumentation (specifically, u-blox Evaluation Kits AEK-4T and EVK-5T are usually employed for tests). goGPS has the potential to reduce costs greatly since there are no limitation in development and distribution.

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A new tsunami observation system has been developed, which employs the RTK-GPS technique to detect a tsunami before it reaches the coast. After a series of preliminary experimental studies, the operation-oriented experiments were conducted at two offshore sites. These systems succeeded to detect four 10cm tsunamis on 23rd June 2001 Peru earthquake, 26th September 2003 Tokachi earthquake, 5th September 2004 Kii earthquake and 28th February 2010 Chile earthquake. The newly established Muroto GPS buoy system is continuously operating now. The developed GPS buoy system has been adopted as a part of the NOWPHAS by the Ministry of Land, Infrastructure, Transport and Tourism. These GPS buoys successfully recorded the tsunami of the 28th February 2010 Chile earthquake (Mw8.6). These results well substantiate of a GPS buoy to be a powerful tool for early detection of tsunami. On going and future potential development of the system include (1) continuous observing system of ocean bottom crustal deformation using GPS-Acoustic system, (2) observation of tropospheric zenith delay for application to atmospheric research through estimating water vapor content, but its potential capability may not be limited only to these.
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