基于小波收缩阈值降噪的卫星重力梯度数据粗差探测方法
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摘要
基于小波分析理论,提出小波收缩阈值降噪对重力梯度测量数据的粗差探测方法,模拟生成含有白噪声和粗差的重力梯度数据,并进行粗差探测的试算和分析。模拟试算结果表明,此方法用于重力梯度测量数据的粗差探测可达到97%的成功率。
On the basis of wavelet theory,the outlier detection algorithm in satellite gravity gradiometry using wavelet shrinkage denoising is established,and simulation data with white noise and outliers is generated.The computed and analysis results indicate that wavelet method is a novel outlier detection algorithm with 97% ratio of success.
On the basis of wavelet theory,the outlier detection algorithm in satellite gravity gradiometry using wavelet shrinkage denoising is established,and simulation data with white noise and outliers is generated.The computed and analysis results indicate that wavelet method is a novel outlier detection algorithm with 97% ratio of success.
引文
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3罗志才,等.GOCE卫星重力梯度测量数据的预处理[J].武汉大学学报(信息科学版),2009,34(10):1163-1167.(Luo Zhicai,et al.Pre-processing of the GOCE sat-ellite gravity gradiometry data[J].Geomatics and Informa-tion Science of Wuhan University,2009,34(10):1163-1167)
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5朱桂芝,等.河西地区重力动态变化的二维离散小波多尺度分解[J].大地测量与地球动力学,2004,(1):46-49.(Zhu Guizhi,et al.Multi-scale decomposition of2-D discrete wavelet of dynamic gravity variation in Hexi region[J].Jour-nal of Geodesy and Geodynamics,2004,(1):46-49)
6宁津生,汪海洪,罗志才.小波分析在大地测量中的应用及其进展[J].武汉大学学报(信息科学版),2004,29(8):659-664(Nin Jinsheng,et al.Applications of wavelet analysis in geodesy and its progress[J].Geomatics and In-formation Science of Wuhan University,2004,29(8):659-664)
7曲国庆,等.小波包消噪方法分析及改进[J].大地测量与地球动力学,2008,(4):102-106.(Qu Guoqing,et al.A-nalysis and improvement of de-noising method for wavelet packet[J].Journal of Geodesy and Geodynamics,2008,(4):102-106)
8高志,余啸海.Matlab小波分析工具箱原理与应用[M].北京:国防工业出版社,2004.(Gao Zhi and Yu Xiaohai.Theory and application of Matlab wavelet analysis[M].Bei-jing:National Defence Industry Press,2004)
9何永红,文鸿雁,靳鹏伟.一种基于小波模极大值去噪的改进算法[J].大地测量与地球动力学,2007,(2):94-98.(He Yonghong,Wen Hongyan and Jin Pengwei.An im-proved de-noising algorithm based on wavelet modular maxi-mum[J].Journal of Geodesy and Geodynamics,2007,(2):94-98)
10李海东,等.基于阈值法的小波去噪算法研究[J].计算机技术与发展,2009,19(7):56-58.(Li Haidong,et al.Wavelet denoising based on technique of threshold[J].Computer Technology and Development,2009,19(7):56-58)
11柳建新,等.小波分析在地震资料去噪中的应用[J].地球物理学进展,2006,21(2):541-545.(Liu Jianxin,et al.Application of wavelet analysis in seismic data denoising[J].Progress in Geophysics,2006,21(2):541-545)
12秦前清,等.实用小波分析[M].西安:西安电子科技大学出版社,1994.(Qing Qianqing,et al.Applications of wavelet analysis[M].Xi’an:Xidian University Press,1994)
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