摘要
在海洋磁力测量中,波浪和风等外界因素的变化会对磁力测量数据在垂直空间上产生影响,而二维Taylor多项式在建立局域海洋地磁场模型时没有考虑高度变化对模型的影响。针对这一问题,提出使用三维Taylor多项式完全展开法来构建局域海洋地磁场模型,通过模拟某海域水下球体磁场,仿真船载磁力测量数据,分析两种模型截断阶数的选择、完全与不完全展开的区别和模型边界效应等问题。实验表明,在顾及高度变化的情况下,三维Taylor多项式模型能更详细地反映海洋磁力异常的分布情况,且较好地改善了边界效应。
Wave and wind effect marine magnetic survey data in the vertical space. This is because the two-dimensional Taylor polynomial doesn＇t include the influence of the change of height in establishing the regional marine geomagnetic field model. In order to solve this problem, a three-dimensional Taylor polynomial is put forward to construct the regional marine geomagnetic field model. By simulating a certain area of underwater sphere magnetic field and ship-borne magnetic survey data, this paper analyzes choosing the truncation order of the two models, the difference between the complete polynomial expansion and the classical expansion methods, and the boundary effect of the two methods. The results show that： the three-dimensional Taylor polynomial method can reflect the distribution of ma- rine magnetic anomalies better and overcomes the boundary effects in considering the height changes.
出处
《大地测量与地球动力学》
CSCD
北大核心
2016年第10期854-858,共5页
Journal of Geodesy and Geodynamics
基金
国家自然科学基金(41574010,41274045,41476087)
地理信息工程国家重点实验室开放基金(SKLGIE2014-M-1-1)~~
关键词
局域海洋地磁场模型
三维Taylor多项式
截断阶数
边界效应
regional marine geomagnetic field model
three-dimensional Taylor polynomial method
truncation order
boundary effect
