拖曳式海洋三分量磁力梯度仪的数据处理方法与应用

党凌峰; 吴招才; 董崇志; 张家岭

doi:10.3969/j.issn.1001-909X.2024.02.008

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海洋学研究 ›› 2024, Vol. 42 ›› Issue (2) : 81-90. DOI: 10.3969/j.issn.1001-909X.2024.02.008

研究论文

拖曳式海洋三分量磁力梯度仪的数据处理方法与应用

党凌峰 ¹ ,
吴招才 ¹^,²^,^* ,
董崇志 ¹ ,
张家岭 ¹^,³

作者信息 +

Data processing method and application of towed marine three-component magnetic gradiometer

DANG Lingfeng ¹ ,
WU Zhaocai ¹^,²^,^* ,
DONG Chongzhi ¹ ,
ZHANG Jialing ¹^,³

Author information +

文章历史 +

摘要

拖曳式海洋三分量磁力梯度仪能够同时获得地磁三分量和磁力梯度数据,与传统的拖曳式总场磁力仪相比具有降低船磁干扰和抵抗地磁日变影响等优点,也存在灵敏度误差、零点偏移误差、正交性误差和位置误差等校准处理的难点。在实际航次中用拖曳式海洋三分量磁力梯度仪实测得到一条剖面数据,经校准后与G880磁力仪重复线测量的地磁总场数据进行外符合精度评价,表明其具有较高的稳定性和可靠性。根据三分量磁力梯度数据计算得到其张量不变量以及磁边界走向图,并结合欧拉反褶积计算,对测线上的磁源体进行了有效识别和解释。结果显示拖曳式海洋三分量磁力梯度仪能够有效获得地磁总场、分量及梯度等多参量信息,可为海洋地磁场测量提供更有效的技术手段。

Abstract

The towed marine three-component magnetic gradiometer can obtain the geomagnetic three-component and magnetic gradient data at the same time. Compared with the traditional towed geomagnetic total field magnetometer, the towed marine three-component magnetic gradiometer has the advantages of reducing the ship magnetic interference and resisting the influence of geomagnetic daily variation, but it also has some shortcomings such as sensitivity error, zero offset error, orthogonality error and position error. In the actual voyage, a section data measured by the towed marine three-component magnetic gradiometer was calibrated to the total geomagnetic field data measured by the G880 magnetometer, which proved its high stability and reliability. Based on the three component magnetic gradient data, the tensor invariants and the trend of magnetic boundary were obtained, and combined with the Euler deconvolution calculation, the magnetic source body on the measurement line was effectively identified and interpreted. The results show that the towed three-component marine gradiometer can effectively obtain the information of geomagnetic field, component and gradient, which can provide a more effective technical means for marine geomagnetic field measurement.

导出引用

党凌峰, 吴招才, 董崇志, 等. 拖曳式海洋三分量磁力梯度仪的数据处理方法与应用[J]. 海洋学研究. 2024, 42(2): 81-90 https://doi.org/10.3969/j.issn.1001-909X.2024.02.008

DANG Lingfeng, WU Zhaocai, DONG Chongzhi, et al. Data processing method and application of towed marine three-component magnetic gradiometer[J]. Journal of Marine Sciences. 2024, 42(2): 81-90 https://doi.org/10.3969/j.issn.1001-909X.2024.02.008

中图分类号： P716.82

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