基于二维经验模态分解的地磁基准图制备边界补偿方法

赵玉新; 常帅; 李旺

doi:10.3799/dqkx.2014.155

Volume 39 Issue 11

Nov. 2014

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Zhao Yuxin, Chang Shuai, Li Wang, 2014. Boundary Compensation Approach in Geomagnetic Map Preparation Based on BEMD. Earth Science, 39(11): 1617-1624. doi: 10.3799/dqkx.2014.155

Citation:

Zhao Yuxin, Chang Shuai, Li Wang, 2014. Boundary Compensation Approach in Geomagnetic Map Preparation Based on BEMD. Earth Science, 39(11): 1617-1624. doi: 10.3799/dqkx.2014.155

Zhao Yuxin, Chang Shuai, Li Wang, 2014. Boundary Compensation Approach in Geomagnetic Map Preparation Based on BEMD. Earth Science, 39(11): 1617-1624. doi: 10.3799/dqkx.2014.155

Citation:

Zhao Yuxin, Chang Shuai, Li Wang, 2014. Boundary Compensation Approach in Geomagnetic Map Preparation Based on BEMD. Earth Science, 39(11): 1617-1624. doi: 10.3799/dqkx.2014.155

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Boundary Compensation Approach in Geomagnetic Map Preparation Based on BEMD

doi: 10.3799/dqkx.2014.155

College of Automation, Harbin Engineering University, Harbin 150001, China

Received Date: 2014-02-24
Publish Date: 2014-11-01

Abstract

Abstract

A boundary compensation method based on bi-dimensional empirical mode decomposition (BEMD) is proposed in this paper to address the boundary effect in preparation of geomagnetic navigation reference map. The local geomagnetic anomaly data are firstly decomposed into components with different scales with BEMD; then for small scale ones instant amplitude and frequency are computed with total Hilbert transform, and the boundary is compensated with self-sampling and feature-matching; whereas for the large scale ones, trigonometric function model is conducted and used to compute the values outside the boundary. After the compensation of local dataset, rectangular harmonic model is used to prepare geomagnetic map. Experimental results indicate that BEMD method could better compress the boundary effect of rectangular harmonic analysis, and improve the mapping precision steadily in comparison with other existing methods.
- geomagnetic anomaly field,
- rectangular harmonic model,
- bi-dimensional empirical mode decomposition (BEMD),
- total Hilbert transform,
- boundary compensation,
- geophysics

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References

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Boundary Compensation Approach in Geomagnetic Map Preparation Based on BEMD

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