A Marine-Buoy-Mounted System for Continuous and Real-Time Measurment of Seafloor Crustal Deformation
A Marine-Buoy-Mounted System for Continuous and Real-Time Measurment of Seafloor Crustal Deformation
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DOI：
10.3389/feart.2020.00123
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发表时间：
2020-04-30
影响因子：
2.9
通讯作者：
Matsuhiro, Kenjiro
中科院分区：
文献类型：
--
作者：
Tadokoro, Keiichi;Kinugasa, Natsuki;Matsuhiro, Kenjiro
在本文中，我们描述了一个连续的实时系统，能够测量海底地壳变形的全球卫星导航系统（GNSS）/声学技术和系泊浮标的发展。在浮标上实施了一个开发的程序，可以自动区分直接声波的开始，即使该波已被反射波污染，并通过机载处理而不是将原始波形传输到地面基站来检测真实的传播时间。这一机载程序有助于减少卫星通信的数据量。我们进行了总共106天的运行测试，发现声波测距和数据传输经常因电源不稳定而中断，导致地面基站仅接收到21%的传输数据。然而，除了上述的电源故障外，我们并没有发现任何连续声学测距的问题。
In this paper, we describe the development of a continuous real-time system capable of measuring seafloor crustal deformation using the global satellite navigation system (GNSS)/Acoustic technique and a moored buoy. A program developed was implemented on the buoy to automatically distinguish the onset of a direct acoustic wave even if that wave had been contaminated with reflected waves and to detect the true travel-times by onboard processing rather transferring raw waveforms to the ground base station. This onboard procedure contributed to reduce the data size over a satellite communication. We conducted an operations test for a total of 106 days and found that the acoustic ranging and data transmissions were frequently interrupted by an unstable power supply, resulting in only 21% of the transmitted data being received at the ground base station. Nevertheless, we did not find any problem with continuous acoustic ranging measurement except for the above-mentioned power supply failure.