| 海面与海底地磁日变化差异及其对海洋磁力测量的影响 |
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| 引用本文： | 夏伟,边刚,金绍华,任来平,王美娜,王琪.海面与海底地磁日变化差异及其对海洋磁力测量的影响[J].海洋测绘,2015,35(1):7-10. |
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| 作者姓名： | 夏伟 边刚 金绍华 任来平 王美娜 王琪 |
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| 作者单位： | 1. 海军大连舰艇学院海洋测绘系,辽宁大连,116018
2. 海军海洋测绘研究所,天津,300061 |
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| 基金项目： | 国家自然科学基金，地球空间环境与大地测量教育部重点实验室测绘基础研究基金，海军大连舰艇学院科研发展基金 |
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| 摘 要： | 给出了海面与海底地磁日变化的计算公式,仿真分析了海面与海底地磁日变化差异,探讨了其对海洋磁力测量地磁日变改正的影响。结果表明:对于不同的地磁日变,海面与海底的地磁日变存在着较大的差异,且其随着地磁倾角的变化而变化,对磁测有一定的影响。为此,远海区海洋磁力测量中,建议联合采用地面日变站和海底日变站来减小或消除海面与海底地磁日变差异对磁测的影响,提高地磁日变改正的精度。
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| 关 键 词： | 海洋磁力测量 地磁日变 地磁日变站 海底日变站 |
Difference of Geomagnetic Diurnal Variation Between Sea Surface andOcean Bottom and Its Effects on Marine Magnetic Survey |
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| XIA Wei,BIAN Gang,JIN Shaohu,REN Laiping,WANG Mein,WANG Qi.Difference of Geomagnetic Diurnal Variation Between Sea Surface andOcean Bottom and Its Effects on Marine Magnetic Survey[J].Hydrographic Surveying and Charting,2015,35(1):7-10. |
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| Authors: | XIA Wei BIAN Gang JIN Shaohu REN Laiping WANG Mein WANG Qi |
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| Institution: | Department of Hydrography and Cartography,Dalian Naval Academy,Dalian 116018 ,China;Naval Institute of Hydrographic Surveying and Charting,Tianjin 300061 ,China |
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| Abstract: | The formula of the geomagnetic diurnal variation on sea surface and ocean bottom has been given out.The influences of the difference have been simulated and analyzed.Furthermore,the effects of the difference inmarine magnetic surveys have been analyzed.The results show that survey products will be greatly affected bythe difference and changed with the inclination of the survey area.In pelagic marine magnetic surveys,landstations and ocean bottom stations are advised to be adopted to decrease or eliminate the influence of thedifference,and the precision of geomagnetic diurnal variation correction will be promoted. |
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| Keywords: | marine magnetic survey geomagnetic diurnal variation sea surfacestation ocean bottom station |
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