Autonomous, Low Cost Platform for Seafloor Geodesy

投资促进机构要求提供资金，以开发一种成本效益高的方法，准确测量海底的短期垂直运动，保持连续的长期海底压力记录，而不需要花费昂贵的船舶时间。这一能力将通过为夏威夷大学波浪滑翔机配备集成声学遥测组件、双频测地级全球定位系统(GPS)接收器、气象传感器、机载嵌入式处理单元和蜂窝遥测来开发。他们将演示如何使用波浪滑翔机来询问海底的高精度压力传感器，以恢复压力和温度数据，并将海底数据与高速率GPS观测数据和气象数据一起传输到岸上。然后，他们将把海底测量与地面气压数据结合起来，并通过波浪滑翔器S全球定位系统的运动定位对海面进行精确的垂直测量，以确定厘米级精度的垂直海底运动。广泛的影响：实时测量海底运动的能力有可能极大地提高对海洋地质灾害的预测。此外，如果这些滑翔机系统最终能够适用于GPS-A系统(即测量水平和垂直运动)，它将彻底改变我们对海底变形的理解。这一拟议项目有可能建立一个平台，能够调查与俯冲区和不稳定火山侧翼近海区域的海啸灾害有关的科学问题。这些问题对社会非常重要，因为数百万人目前容易受到海啸的影响。增加一个用于收集海底大地测量数据的低成本、非船舶资源将对科学界极为有益。它还将为一名研究生提供资金。

The PIs request funding to develop a cost effective approach for accurately measuring short-term vertical motions of the seafloor, maintaining a continuous long-term record of seafloor pressure without the requirement for costly ship time. This capability will be developed by equipping a University of Hawaii Wave Glider with an integrated acoustic telemetry package, a dual frequency geodetic-grade Global Positioning System (GPS) receiver, meteorological sensors, an onboard embedded processing unit, and cellular telemetry. They will demonstrate the use of the Wave Glider to interrogate high accuracy pressure sensors on the sea floor to retrieve pressure and temperature data, and transmit the seafloor data along with high rate GPS observables and meteorological data to shore. They will then integrate the seafloor measurements with surface air pressure data, and precise vertical measurements of the sea surface from kinematic positioning of the Wave Glider?s GPS to determine cm-scale accuracy vertical seafloor motions.Broader Impacts: The ability to make real-time measurements of seafloor motions has the potential to dramatically enhance prediction of marine geo-hazards. Further, if these glider systems can eventually be adapted for GPS-A systems (i.e., measurement of horizontal as well as vertical motions) it will revolutionize our understanding of seafloor deformation. This proposed project has the potential to create a platform that would be capable of investigating scientific questions related to tsunamigenic hazards in offshore regions of subduction zones and unstable volcano flanks. These questions are of great importance to society as many millions of people are currently vulnerable to tsunami impacts. The addition of a low-cost, non-ship based resource for collection seafloor geodetic data would be extremely beneficial to the scientific community. It will also provide funding for a graduate student.