A-35 TURNING-RAY TOMOGRAPHY FOR STATICS SOLUTION D. EPILI J. CRISS and D. CUNNINGHAM Green Mountain Geophysics An Input/Output Inc. Company 361 Centennial Parkway Suite 200 Louisville CO 80027 USA 1 Summary A tomographic imaging technique combined with delay time analysis is proposed for constructing near surface velocity structure from first arrivals. Analysis on a 2-D data set from Eastern Colorado and a 3-D data set from Western Canada indicated that traditional refraction techniques provide a better short period statics solution in presence of a layered model of varying velocity and thickness whereas turning ray tomography provide a better solution in


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