基于三维Taylor多项式建立局域海洋地磁场模型
发布时间：2019-07-23 14:03
【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。
[Abstract]:In the sea magnetic measurement, the change of the external factors, such as wave and wind, can influence the magnetic force measurement data in the vertical space, and the two-dimensional Taylor polynomial does not consider the influence of the height change on the model when the local marine geomagnetic field model is established. in ord to solve that problem, a three-dimensional Taylor polynomial complete expansion method is put forward to construct the local marine geomagnetic field model, and by simulating the magnetic field of the underwater sphere of a sea area, the ship-borne magnetic force measurement data is simulated, and the selection of the two model truncation orders is analyzed, And the problems of complete and incomplete expansion and model boundary effect and the like are solved. The experiment shows that the three-dimensional Taylor polynomial model can reflect the distribution of the magnetic anomaly of the ocean in more detail, and the boundary effect is better improved.
【作者单位】： 信息工程大学地理空间信息学院;地理信息工程国家重点实验室;海军工程大学导航工程系;
【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)~~
【分类号】：P714
，
本文编号：2518205
[Abstract]:In the sea magnetic measurement, the change of the external factors, such as wave and wind, can influence the magnetic force measurement data in the vertical space, and the two-dimensional Taylor polynomial does not consider the influence of the height change on the model when the local marine geomagnetic field model is established. in ord to solve that problem, a three-dimensional Taylor polynomial complete expansion method is put forward to construct the local marine geomagnetic field model, and by simulating the magnetic field of the underwater sphere of a sea area, the ship-borne magnetic force measurement data is simulated, and the selection of the two model truncation orders is analyzed, And the problems of complete and incomplete expansion and model boundary effect and the like are solved. The experiment shows that the three-dimensional Taylor polynomial model can reflect the distribution of the magnetic anomaly of the ocean in more detail, and the boundary effect is better improved.
【作者单位】： 信息工程大学地理空间信息学院;地理信息工程国家重点实验室;海军工程大学导航工程系;
【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)~~
【分类号】：P714
，
本文编号：2518205
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