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Development of real-time monitoring system using GPS Virtual Reference Station

GPS虚拟参考站实时监控系统的开发

基本信息

批准号：
14380200
负责人：
KATO Teruyuki
金额：
$ 9.73万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14380200/
关键词：
GPS RTK-GPS VRS Virtual Reference System real-time positioning crustal movement VPS

项目摘要

The major purposes of the project were to investigate if Virtual Reference Station of GPS could be used for crustal deformation studies and to investigate other kinematic application of GPS high sampling rate could be used for crustal deformation studies. For this purpose, in the first year of the project, we purchased two new GPS receivers. Then we conducted experiments of VRS system every year at Shizuoka University. Reference stations were employed from surrounding GEONET stations from where we obtain 1-sec phase data through commercial network on the mobile phone. We made post-processing of the obtained data using Trimble's Total Control software and also using 3D-Tracker which we purchased through the project. Preliminary results showed about 1-2cm accuracy in positioning. Therefore VRS might be acceptable for crustal deformation studies in terms of accurracy. However, the problem is data acquisition because we have to use mobile phone for obtaining reference data. If we conduct continuous and permanent observation of the site displacement, it will be unacceptably expensive. Therefore, as a conclusion of the project, we are inclining to think that it would be premature to use the VRS GPS system for continuous crustal deformation monitoring. On the other hand, kinematic application of the GPS positioning has a wide variety of applications. 1-Hz sampling GPS data were used at the time of 2003 Tokachi earthqukae and we succeeded to detect seismic vibrations at the GPS sites nearby the hypocenter. The data analysis was made off line using GIPSY software. In addition, real-time kinematic GPS observation has been applied for tsunami monitoring using GPS buoy. The buoy was deployed about 13km south of Muroto Promontory in April 2004. The buoy enabled to detect tsunami of about 10cn height at the time of Kii-Nanto-Oki earthquake.

该项目的主要目的是调查全球定位系统虚拟参考站是否可用于地壳变形研究，以及调查全球定位系统的其他运动学应用。为此，在项目的第一年，我们购买了两台新的GPS接收机。然后我们每年在静冈大学进行VRS系统的实验。参考站来自周围的GEONET站，我们通过商业网络在移动的电话上获得1秒相位数据。我们使用特林布尔的Total Control软件和通过项目购买的3D-Tracker对获得的数据进行了后处理。初步结果显示，定位精度约为1-2cm。因此，VRS在地壳形变研究中的精度是可以接受的。然而，问题是数据采集，因为我们必须使用移动的电话来获取参考数据。如果我们要对地盘的位移进行持续和永久的观察，所需的费用是难以接受的。因此，作为该项目的结论，我们倾向于认为，现在使用VRS GPS系统进行地壳形变连续监测还为时过早。另一方面，GPS定位的运动学应用具有广泛的应用。在2003年十胜地震时使用了1 Hz采样GPS数据，我们成功地检测到了震源附近GPS站点的地震振动。使用GIPSY软件离线进行数据分析。此外，还利用全球定位系统浮标对海啸进行实时动态观测。该浮标于2004年4月在室户岬以南约13公里处部署。该浮标能够在纪伊-南岛-冲地震时探测到约10 cn高的海啸。