| 在波数域计算一维重磁异常导数的Matlab语言算法 |
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| 引用本文： | 肖锋,孟令顺,吴燕冈.在波数域计算一维重磁异常导数的Matlab语言算法[J].物探与化探,2008,32(3):316-320. |
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| 作者姓名： | 肖锋 孟令顺 吴燕冈 |
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| 作者单位： | 吉林大学,地球探测科学与技术学院,吉林,长春,130026 |
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| 摘 要： | 利用Matlab内建的快速傅氏变换函数可以方便地在波数域计算重磁异常导数。介绍了基于Matlab语言的波数域求导的算法,给出了程序源代码,讨论了一些有助于提高计算精度的编程技巧。通过模型试验和数据分析,发现在计算垂向导数时波数域求导算法的精度比傅氏级数的精度有明显改善;而水平导数的计算,2种方法的精度相当。在某区钾盐勘探中,用该方法处理高精度重力剖面数据,取得了较好效果。
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| 关 键 词： | 波数域 重磁异常 导数 Matlab语言 |
| 文章编号： | 1000-8918(2008)03-0316-05 |
| 收稿时间： | 2007-09-14 |
| 修稿时间： | 2007年9月14日 |
A MATLAB ALGORITHM FOR DERIVATIVE CALCULATION OF 1D GRAVITY AND MAGNETIC ANOMALY IN WAVE NUMBER SPACE |
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| XIAO Feng,MENG Ling-shun,WU Yan-gang.A MATLAB ALGORITHM FOR DERIVATIVE CALCULATION OF 1D GRAVITY AND MAGNETIC ANOMALY IN WAVE NUMBER SPACE[J].Geophysical and Geochemical Exploration,2008,32(3):316-320. |
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| Authors: | XIAO Feng MENG Ling-shun WU Yan-gang |
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| Institution: | Geo-Exploration Science and Technology Institute of Jilin University, Changchun 130026, China |
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| Abstract: | It is convenient to calculate derivative in wave number space using the inbuilt FFT function in Matlab. This paper describes a matlab algorithm for derivative calculation of 1D gravity and magnetic anomaly in wave number space, gives code of program and deals with some programming skills for precision improvement. Through model test and data analysis, it is found that the precision of the FFT method is much higher than that of the Fourier Series method in vertical derivative calculation. In horizontal derivative calculation, however, the precisions of the two methods are almost the same. During kainite exploration in a certain basin, satisfactory result was obtained in the processing of gravity profile data using this method. |
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| Keywords: | wave number space gravity and magnetic anomaly derivative Matlab language |
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