New Approach for Tsunami Detection Based on RTK-GNSS Using Network of Ships

R. Nakasone and N. Kubo

Abstract:	Tsunami detection systems have been developed and studied for more than a decade. The destruction brought about by the tsunamis that followed the earthquake in Japan in March 2011 has further emphasized the importance of using better detection, monitoring, and early-warning technologies. The current tsunami detection system in Japan [1] employs real-time kinematic (RTK) GNSS technology, which monitors a moving platform in real time within an accuracy of a few centimeters via relative positioning. We propose a method using network of ships to position in centimeter accuracy over 20 km off the coast. Using already existing ships as bases will cut the running cost dramatically, and the surveillance points will increase. We surveyed ships sailing along the north part of the Nankai Trough, south of Nagoya, and concluded that there were enough ships that can be used. We did two experiments to verify the accuracy: one using stationary reference points from the Geospatial Information Authority of Japan (GSI) and the other using ships under real environment conditions. Based on the results, we concluded that the convenience and accuracy of the proposed method are suitable, but the communication method with land will need further research.
Published in:	Proceedings of the 25th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2012) September 17 - 21, 2012 Nashville Convention Center, Nashville, Tennessee Nashville, TN
Pages:	3636 - 3641
Cite this article:	Nakasone, R., Kubo, N., "New Approach for Tsunami Detection Based on RTK-GNSS Using Network of Ships," Proceedings of the 25th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2012), Nashville, TN, September 2012, pp. 3636-3641.
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