Institute of Regional Development, Taisho University.
National Institute of Technology, Kochi College.
Proc Jpn Acad Ser B Phys Biol Sci. 2022;98(2):49-71. doi: 10.2183/pjab.98.004.
A global navigation satellite system (GNSS) buoy system for early tsunami warnings has been developed for more than 20 years. The first GNSS buoy system using a real-time kinematic algorithm (RTK) was implemented in the Nationwide Ocean Wave information network for Ports and HArbourS (NOWPHAS) wave monitoring system in Japan in 2008. The records of NOWPHAS were used to update the tsunami alert by the Japan Meteorological Agency (JMA), owing to the tsunami generated by the 2011 Tohoku-oki earthquake (Mw9.0). However, considering that the distance limit is less than 20 km for the RTK algorithm, a new system was designed by introducing a new positioning algorithm and satellite data transmission to place the buoy much farther from the coast. A new technique for the continuous monitoring of ocean-bottom crustal movements was also implemented in the new system. The new buoy system can be used for weather forecasting and ionospheric monitoring as well.
全球导航卫星系统(GNSS)浮标系统已开发了 20 多年,用于早期海啸预警。第一个使用实时动态算法(RTK)的 GNSS 浮标系统于 2008 年在日本全国海洋波浪信息网络用于港口和港湾(NOWPHAS)波浪监测系统中实施。NOWPHAS 的记录被用于更新日本气象厅(JMA)的海啸警报,这是由于 2011 年东北-奥基地震(Mw9.0)引发的海啸。然而,考虑到 RTK 算法的距离限制小于 20 公里,因此通过引入新的定位算法和卫星数据传输,设计了一个新系统,以便将浮标放置在离海岸更远的地方。新系统还实施了一种用于连续监测海底地壳运动的新技术。新的浮标系统也可用于天气预报和电离层监测。