| 基于多面函数的局域地磁场建模方法研究 |
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| 引用本文： | 赵建虎,刘辉,张彦昌,王胜平.基于多面函数的局域地磁场建模方法研究[J].海洋通报,2009,28(4). |
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| 作者姓名： | 赵建虎 刘辉 张彦昌 王胜平 |
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| 作者单位： | 1. 武汉大学,测绘学院,湖北,武汉,430079
2. 交通部天津水运工程科学研究院,天津,300456 |
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| 基金项目： | 国家863项目资助;项目编号2007AA12Z326 |
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| 摘 要： | 基于多面函数,研究了局域海洋地磁场建模的理论和方法,并对建模中数据质量的控制问题、适用于地磁场建模的核函数的选择问题、平滑因子的选择以及建模数据的选择等关键问题进行了研究,并根据地磁数据变化剧烈的特点和多面函数的特性,提出了分区建模的设想.将该方法与传统的 Taylor 多项式、Legendre 多项式和曲面函数建模方法进行了比较,表明该方法具有较高的精度和可靠性.
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| 关 键 词： | 地磁场模型 多面函数地磁场模型 核函数 分区建模 |
Study on construction of local marine geomagnetic field model based on multi-surface function |
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| ZHAO Jian-hu,LIU Hui,ZHANG Yan-chang,WANG Sheng-ping.Study on construction of local marine geomagnetic field model based on multi-surface function[J].Marine Science Bulletin,2009,28(4). |
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| Authors: | ZHAO Jian-hu LIU Hui ZHANG Yan-chang WANG Sheng-ping |
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| Institution: | 1. School of geodesy and Geomatics;Wuhan University;Wuhan 430079;China 2. Tianjin Research Institute for Water Transport Engineering;Tianjin 300456;China |
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| Abstract: | Based on multi-surface function, the principle and method for building geomagnetic field model in local marine area are studied in this paper. In the research, we give a kind of trend surface filter for eliminating abnormal geomagnetic strength, and improve data quality in building model. Then, we also study the choice of core function. By comparing and analyzing, we think that using normal hyperbola function in multi-surface model is better than using inverse hyperbola function in multi-surface model, as i... |
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| Keywords: | geomagnetic field model multi-surface function core function construction of subsection geomagnetic model |
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