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Accurate measurement and inversion for the seafloor positions of Hadal landers
Chen Han1,4; Qiu XueLin1,4; He EnYuan1; Wang Yuan2; Chen ChuanXu3; Chen Jun3,4

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.

KeywordOcean Bottom Seismometer Hadal Lander Cross-line Shooting Operation Seafloor Position Correction Monte Carlo Inversion
Indexed BySCI
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000467308600014
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Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorQiu XueLin
Affiliation1.Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China
2.Chinese Acad Sci, Key Lab Petr Resource Res, Inst Geol & Geophys, Beijing 100029, Peoples R China
3.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China
4.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Chen Han,Qiu XueLin,He EnYuan,et al. Accurate measurement and inversion for the seafloor positions of Hadal landers[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2019,62(5):1744-1754.
APA Chen Han,Qiu XueLin,He EnYuan,Wang Yuan,Chen ChuanXu,&Chen Jun.(2019).Accurate measurement and inversion for the seafloor positions of Hadal landers.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,62(5),1744-1754.
MLA Chen Han,et al."Accurate measurement and inversion for the seafloor positions of Hadal landers".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 62.5(2019):1744-1754.
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