| 深渊着陆器坐底位置的精确测量和反演计算 |
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| 引用本文： | 陈瀚,丘学林,贺恩远,王元,陈传绪,陈俊.深渊着陆器坐底位置的精确测量和反演计算[J].地球物理学报,2019,62(5):1744-1754. |
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| 作者姓名： | 陈瀚 丘学林 贺恩远 王元 陈传绪 陈俊 |
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| 作者单位： | 1. 中国科学院南海海洋研究所, 边缘海与大洋地质重点实验室, 广州 510301;2. 中国科学院地质与地球物理研究所, 油气资源研究重点实验室, 北京 100029;3. 中国科学院深海科学与工程研究所, 三亚 572000;4. 中国科学院大学, 地球与行星科学学院, 北京 100049 |
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| 基金项目： | 中科院先导专项（XDB060302），国家重点研发计划（2018YFC0309800）和中科院重点部署项目（ZDBS-SSW-JSC001）联合资助. |
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| 摘 要： | 深渊着陆器在下潜过程中,由于受到海流的影响,其坐底位置会偏离投放点,偏离量和偏离方向很难估计,而声学水下定位方法在深渊海区不太适用.通过在海面进行气枪十字放炮作业,利用炮点准确位置和时间信息,以及海底地震仪(Ocean Bottom Seismometer,OBS)记录的直达水波到时,对深渊着陆器的坐底位置进行精确测量可以提供有效定位数据.该方法对采集得到的数据进行预处理,使用蒙托卡洛方法结合最小二乘法,对万泉号着陆器实际坐底位置进行了反演校正,得到三个潜次的位置校正偏移量分别为211m、178m、861m,偏移方向各不相同,校正精度为±20m,比以往的定位精度大为提高.此外,该方法测量确定了三个海底标志物的精确位置,为未来万米无人或载人潜器提供了可靠的水下参考坐标.
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| 关 键 词： | 海底地震仪 深渊着陆器 十字放炮法 海底位置校正 蒙托卡洛反演 |
| 收稿时间： | 2018-08-12 |
Accurate measurement and inversion for the seafloor positions of Hadal landers |
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| CHEN Han,QIU XueLin,HE EnYuan,WANG Yuan,CHEN ChuanXu,CHEN Jun.Accurate measurement and inversion for the seafloor positions of Hadal landers[J].Chinese Journal of Geophysics,2019,62(5):1744-1754. |
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| Authors: | CHEN Han QIU XueLin HE EnYuan WANG Yuan CHEN ChuanXu CHEN Jun |
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| Institution: | 1. Key Laboratory of Ocean and Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China;2. Key Laboratory of Petroleum Resource Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;3. Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences, Sanya 572000, China;4. College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | Due to the influence of ocean currents, Hadal landers deviate from the launch points during dives. The deviation offset and direction are difficult to be estimated. Moreover, the underwater acoustic positioning method is not suitable in the Hadal areas. Through the cross-line air-gun shooting operation carrying out on the sea surface, and by using the accurate position and timing information of each air-gun shot, as well as the arrival times of direct water waves recorded by the Ocean Bottom Seismometer (OBS), the seafloor positions of Hadal Landers can be measured precisely. In this method, the collected data are preprocessed and inversed for the actual landing positions of Wanquan Hadal Lander, using the Monte Carlo method combined with the least square method. The obtained position correction offsets of the three dives are 211 m, 178 m and 861 m respectively, with different deviation directions from each other. The measurement precision is ±20 m, which is much more accurate than the previous ones. In addition, this method determines precise locations of the three seafloor markers and provides reliable underwater reference coordinates for the future 10000 m-type unmanned or manned submersibles. |
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| Keywords: | Ocean Bottom Seismometer Hadal lander Cross-line shooting operation Seafloor position correction Monte Carlo inversion |
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