Construction of tsunami disaster reduction system using the GPS tsunami measuring system

利用GPS海啸测量系统构建海啸减灾系统

• 批准号: 11792031
• 负责人: KATO Teruyuki
• 金额: $ 4.93万
• 依托单位: the University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for University and Society Collaboration
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11792031/
• 关键词: tsunami measuring instrument; GPS; RTK; tsunami; reverse RTK; 防災; RTK-GPS

We have devised a tsunami monitoring system which uses a buoy that carries a RTK-GPS. The signal acquired at the buoy is transmitted to the onshore base station and the RTK processing is done at the base. The analyzed motion of the buoy is transmitted to the Ofunato City Hall and the Fire Station to monitor the sea surface motion. The system was an improved set based on the preliminary experiment conducted in the Sagami Bay in 1999. The long-term experiment by the present system began on January 23rd, 2000, at the offshore of Ofunato city. The distance from the shore is about 1.5km and one year of experiment was designed. The system was able to register the tsunami on June 25th (JST) that was propagated over the Pacific, which was generated by an earthquake offshore Peru about one day before. The accuracy of measuring the tsunami seemed to be about 1-2cm, which is good enough to detect hazardous tsunami at the shore. The analyzed data are automatically uploaded to the web page (http://tsunami.ekankyo21.com/) which allowed anyone to monitor sea surface at any time where internet is available. Although the experiment has been successful so far, some problems are now evident to extend the system for further offshore establishments ; 1) maintain the accuracy of RTK positioning to about 2-3cm for more than 10km baseline, 2) reliable tethering of the buoy at deeper ocean and 3) robust data telemetry system and 4) development of an automatic tsunami detection algorithm.

我们设计了一个海啸监测系统，该系统使用带有RTK-GPS的浮标。浮标采集的信号传输到陆上基站，在基站进行RTK处理。浮标的分析运动被传送到大船渡市政厅和消防局，以监测海面运动。该系统是1999年在相模湾进行的初步实验的基础上改进而成的。本系统的长期实验于2000年1月23日在大船渡市近海开始。距海岸约1.5km，试验期为一年。该系统能够记录6月25日（JST）在太平洋上传播的海啸，该海啸是由大约一天前的秘鲁近海地震引起的。测量海啸的精度似乎在1- 2厘米左右，这足以在海岸检测到危险的海啸。分析后的数据自动上传到网页（http：//tsunami.ekankyo21.com/），任何人都可以在互联网可用的任何时候监测海面。尽管到目前为止，该实验是成功的，但现在显然存在一些问题，需要将该系统扩展到更多的海上设施; 1）对于超过10 km的基线，将RTK定位的精度保持在约2- 3 cm，2）在更深的海洋中浮标的可靠系留，3）强大的数据遥测系统，以及4）自动海啸检测算法的开发。

项目成果

Kato, T., 他9名: "A new tsunami monitoring system using RTK-GPS"ITS 2001 Proceedings. 645-651 (2001)

Kato, T. 和其他 9 人：“使用 RTK-GPS 的新海啸监测系统”ITS 2001 会议记录 645-651 (2001)。

Kato, T., Y. Terada, M. Kinoshita, H. Kakimoto, H. Isshiki, M. Matsuishi, A. Yokoyama, and T. Tanno: "Real-time observation of tsunami by RTK-GPS"Earth, Planets and Space. 52-11. 841-845 (2000)

Kato, T.、Y. Terada、M. Kinoshita、H. Kakimoto、H. Isshiki、M. Matsuishi、A. Yokoyama 和 T. Tanno：“通过 RTK-GPS 实时观测海啸”地球、行星和

寺田幸博: "GPS津波計"返仁. 88. 22-26 (2000)

Yukihiro Terada：“GPS 海啸计”Return Hitoshi。88. 22-26 (2000)

Isshiki, H., A. Tsuchiya, T. Kato, Y. Terada, H. Kakimoto, M. Kinoshita, M. Kanzaki and T. Tanno: "Precise variance detection by a single GPS receiver -PVD (Point precise Variance Detection) method-"J. Geod. Soc. Japan. 46-4. 239-251 (2000)

Isshiki, H., A. Tsuchiya, T. Kato, Y. Terada, H. Kakimoto, M. Kinoshita, M. Kanzaki 和 T. Tanno：“通过单个 GPS 接收器进行精确方差检测 -PVD（点精确方差检测）

Isshiki, H., 他7名: "Precise variance detection by a single GPS receiver-PVD(Point precise Variance Detection)method-"J.Geod.Soc.Japan. 46. 239-251 (2000)

Isshiki, H. 和其他 7 人：“通过单个 GPS 接收器进行精确方差检测 - PVD（点精确方差检测）方法 -”J.Geod.Soc.Japan，46. 239-251 (2000)。