Modeling re ections with an elastic screen method

This paper gives two versions of elastic screen method The wide angle version has a better accuracy while the small angle approximation is more e cient The accu racy of the re ectivity is discussed by comparing the analytical results from the screen method and those directly from plane wave re ections The accuracy of waveform is checked by comparing synthetic seis mograms from both screen method and full wave FD method We also discussed the application of elastic screen method in modeling seismic re ections in D or D elastic models