Tomography of the complex mountains with seismic waves 1998-1999 The seismic waves are shot from one side of the mountain, and recieved from the other side of the mountain, vice versa. then I created a initiative velocity modle of the mountain, then I created a large seismic wave travelling time equtaion. I implemented SIRT algorithm to resolve the over-determined equation group. SIRT is an acronym for "Simultaneous Iterative Reconstruction Techniquse"
SIRT is a effective and fast iterative solution of sparse linear least-squares problems.