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《Progress in Geophysics》 2011-01
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Application of mathematical morphology-based filter in denoising geomagnetic data

XIE Fan,TENG Yun-tian,HU Xing-xing(Institute of Geophysics China Earthquake Administration,Beijng 100081,China)  
In order to deal with instrument noise and impulse noise encountered in geomagnetic observations,a new data processing method based on the mathematical morphology filter is proposed to process geomagnetic signals with such noise.In this study,we use this method to process the stimulated geomagnetic diurnal variation signals combined with random noise and transient impulse noise.The numerical stimulation results indicate that the mathematical morphology filter is effective to eliminate the random noise and impulse noise,and improve the signalnoise ratio of geomagnetic signals.It is proved this new method has a good characteristic in processing the real geomagnetic signals with instrument noise and impulse noise caused by a passing vehicle.
【Fund】: 公益性行业(地震)科研专项(20070817)资助
【CateGory Index】: P318.6
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