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《Progress in Geophysics》 2008-03
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Simulation on directional illumination method of controlled source array

YANG Dong1,2,JIANG Tao2,3(1.College of Earth Sciences,Jilin University,Changchun 130026,China;2.College of Instrument Science and Electrical Engineering,Jilin University,Changchun 130026,China;3.Key Laboratory of geo-exploration instrumentation of Ministry of Education,Jilin University,Changchun 130026,China)  
If noise from the field is so strong that we can not get data with proper signal-to-noise ratio(SNR) even if combination source is used,we develop a directional illumination method of controlled source,which can form a directional seismic wave.We make a numeric simulation of multi-trace seismograms and computed reflected waves' SNR improvement when directional illumination method of controlled source array was used in given horizontal stratified model.It shows the results that SNR of reflected waves from different reflectors increase 10.19 dB,3.23 dB,and 1.02 dB respectively than the case of combination source when 8-unit controlled source array were used with delay time of 0.89 ms.And therefore the directional illumination control method of controlled source array is competent to improve seismic signal SNR.
【Fund】: 国家自然科学基金项目(40674096)资助
【CateGory Index】: P631.4
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