厦门大学学报（自然科学版）2026，Vol.65Issue(2)：278-288,11.DOI:10.6043/j.issn.0438-0479.202507007
"嘉庚"号船载地磁三分量数据采集、处理和分析
Data acquisition,processing and analysis of shipborne geomagnetic three-component data from research vessel Tan Kah Kee
摘要
Abstract
[Objective]Due to vehicle magnetic interference,difference in data transfer latency and complexities of compensation calibrations and algorithms for ship magnetism,the accuracy of the shipborne geomagnetic three-component measurement system(STCM)is limited.Unfortunately,such a limitation restricts popularization and application of STCM.[Methods]Therefore,taking advantage of the nonmagnetism above the main deck of RV TAN KAH KEE,we carry out the experiment of self-developed STCM in the northern South China Sea,and mainly summarize practical and effective ways of registration synchronization of the fluxgate sensors with POS,and calculations for total field constraint and compensation.Focusing on the difficulty of registration synchronization caused by difference in data transfer latency,we use simulated three-component data of the comprehensive error model to synchronize their registration.Likewise,focusing on the deviation of the three-component model of geomagnetic field from the real background field,we solve the magnetic compensation parameters with the total field constraint obtained by the towing measurement.[Results]In this test,the root-mean-square of over-cross differences of the compensated total fields of STCM before and after synchronization is reduced from±17.75 nT to±12.91 nT,and the root-mean-square of its difference with the total field obtained by the towing measurement is reduced to less than±20 nT.[Conclusion]Results show that registration synchronization plays a more critical role than the pure ship magnetic compensation model and its algorithm improvement do in improving STCM measurement accuracy.Although attitude data are not used in the total field constraint and compensation solution,their application is necessary in synchronization,three-component constraint and compensation solution.Finally,reasons for mismatch and other high-frequency interference of three-component are summarized,as well as optimization measures of suppressig for these sources.These data processing procedures can benefit the popularization and application of STCM.关键词
海洋磁力测量/船载地磁三分量/综合误差模型/配准同步/总场约束Key words
marine magnetometry/shipborne geomagnetic three-components/comprehensive error model/registration synchronization/total field constraint分类
天文与地球科学引用本文复制引用
高金耀,樊新志,贺惠忠,王伟平,李娜,吴学文,蔡晓仙.."嘉庚"号船载地磁三分量数据采集、处理和分析[J].厦门大学学报（自然科学版）,2026,65(2):278-288,11.基金项目
国家专项任务(GASI-01-YZ-CLY) （GASI-01-YZ-CLY）
