首页> 外文期刊>測地学会誌 >海底地変動観測のための精密海底測位手法の確立などの海洋測地学への貢献
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海底地変動観測のための精密海底測位手法の確立などの海洋測地学への貢献

机译:对海洋地理的贡献,例如建立精确的海底定位方法以观察海底波动

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This paper mainly summarizes the efforts made on the development of the GPS/Acousticseafloor geodetic observation technique carried out by the Japan Coast Guard, especially theway of tackling various error sources in the data analysis procedure to attain the precision ofcentimeters level. The principal errors in this technique arise from the long baseline condition forthe kinematic GPS and acoustic velocity structure in seawater for the undersea positioning. Theformer was minimized by applying the software properly treating the spatial inhomogenuity inthe troposphere and ionosphere together with considering various operational conditions basedon the height assessment of positioning results. The latter is more specific to this technique andwas resolved through numerical estimation of errors along with the development of the underseapositioning algorithm. After tremendous efforts for improving the precision including above, wehad successfully detected the intraplate seafloor movement associated with the oceanic platesubduction off Miyagi Prefecture in 2004, for the first time in Japan. Remarkable results havefollowed since then with the precision and its stability improved. The paper also touches upon theauthor's other contributions to the marine geodesy fields: those relevant to the establishment ofthe marine geodetic control network by JCG using the SLR technique and also to the discussion ofoceanic effects on the earth rotation variation through the torque approach.
机译:本文主要总结了日本海岸警卫队在开发GPS /声学海底大地观测技术方面所做的努力,特别是在数据分析过程中解决各种误差源以达到厘米级精度的方法。这项技术的主要错误是由于运动GPS的基线条件较长以及海水在水下定位的声速结构所致。通过应用适当处理对流层和电离层空间不均匀性的软件,并根据定位结果的高度评估来考虑各种操作条件,从而使前者最小化。后者更特定于此技术,并且通过对误差进行数值估计以及海底定位算法的发展得以解决。经过努力提高精度(包括上述精度),我们于2004年成功在日本宫城县成功发现了与洋板俯冲有关的板内海底运动。从那以后取得了令人瞩目的结果,其精度和稳定性得到了提高。本文还涉及作者对海洋大地测量学领域的其他贡献:与JCG使用SLR技术建立海洋大地测量控制网络有关的方面,以及与海洋对通过转矩法对地球自转变化的影响的讨论有关的方面。

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