| 海洋局域地磁正常场勒让德多项式模型的建立 |
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| 引用本文： | 赵建虎,王胜平,刘辉,张彦昌.海洋局域地磁正常场勒让德多项式模型的建立[J].地球物理学进展,2008,23(6):1802-1808. |
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| 作者姓名： | 赵建虎 王胜平 刘辉 张彦昌 |
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| 作者单位： | 1. 武汉大学测绘学院,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： | 国家高技术研究发展计划(863计划)
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| 摘 要： | 研究了利用勒让德多项式构建局部海域地磁正常场模型的方法,给出了一种趋势面地磁数据滤波方法和模型截止阶数的确定方法,研究和分析了参与建模的地磁总强度数据的代表性和密度对地磁正常场模型精度的影响,最后提出了一种分区建模的思想.试验表明分区建模相对整体建模具有较高的精度.
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| 关 键 词： | 地磁正常场 勒让德多项式地磁场模型 模型截止阶数 模型精度 |
| 收稿时间： | 2007-12-10 |
| 修稿时间： | 2008-3-20 |
Construction of normal geomagnetic filed model with Legendre polynomial model in local marine area |
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| ZHAO Jian-hu,WANG Sheng-ping,LIU Hui,ZHANG Yan-chang.Construction of normal geomagnetic filed model with Legendre polynomial model in local marine area[J].Progress in Geophysics,2008,23(6):1802-1808. |
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| Authors: | ZHAO Jian-hu WANG Sheng-ping LIU Hui ZHANG Yan-chang |
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| Institution: | (1.SchoolofgeodesyandGeomatics,WuhanUniversity,Wuhan430079,China;2.TianjinResearchInstituteforWaterTransportEngineering,Tianjin300456,China) |
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| Abstract: | Based on analyzing the importance of building geomagnetic field model, principle of construction of geomagnetic field model with Legendre polynomial is studied firstly. We give a kind of trend surface filleting method for elinateing abnormal geomagnetic data, and a method for determination of final order of geomagnetic field model in the paper. Besides, we also study the influence of character and density of data for final order of model and model accuracy. Finally, we present a method, named subsection building model, which was tested by an experiment and show that has higher accuracy than building mode in whole area. |
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| Keywords: | normal geomagnetic field Legendre geomagnetic filed model truncation model order model accuracy |
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