Development of Seafloor Positioning System for Crustal Dynamics Observation

Research Project

Project/Area Number	07554016
Research Category	Grant-in-Aid for Scientific Research (A)
Allocation Type	Single-year Grants
Section	展開研究
Research Field	固体地球物理学
Research Institution	KYOTO UNIVERSITY
Principal Investigator	ANDO Masataka DPRI,Kyoto Univ., Prof., 防災研究所, 教授 (80027279)
Co-Investigator(Kenkyū-buntansha)	MURAKAMI Hideyuki Kaiyo electron co LTD.Cheif researcher, 海洋電子株式会社, 主任研究者 TSUDA Toshitaka Kyoto Univ.Prof., 超高層電波研究センター, 教授 (30115886) KATAO Hiroshi DPRI.Kyoto Uni.Research Associate, 防災研究所, 助手 (80221878)
Project Period (FY)	1995 – 1997
Project Status	Completed (Fiscal Year 1997)
Budget Amount *help	¥17,800,000 (Direct Cost: ¥17,800,000) Fiscal Year 1997: ¥2,100,000 (Direct Cost: ¥2,100,000) Fiscal Year 1996: ¥2,400,000 (Direct Cost: ¥2,400,000) Fiscal Year 1995: ¥13,300,000 (Direct Cost: ¥13,300,000)
Keywords	Crustal deformation / seafloor positioning / GPS / accuracy / 水温 / 塩分濃度 / 白浜海象観測所 / 海底観測 / 海底海底地球物理測定 / 海底 / 地殻変動 / M系列 / 水中音速 / トランスポンダー / 船位 / 海水温度 / 南海地震 / GPS測量
Research Abstract	Using the multiple acoustic ranging technique, which is described in Chapter 4, we can expect to reduce these uncertainties of the sound-speed structures. This technique is based on the code division multiple access technology and makes it possible to carry out acoustic ranging measurements to several seafloor references simultaneously. According to the results of this study, we can expect to be able to locate the seafloor references with accuracy on 10 to 20 cm in the horizontal components within the area of about 100 km away from an on-land GPS reference site. Hence, the co-seismic crustal defamation with the large subduction-type earthquakes are expected to detect using the current seafloor positioning system. And more accurate seafloor positioning will be possible by improving the observation system.