A New Implementation for Nonlinear First Arrival Traveltime Tomography

In this paper nonlinear traveltime tomography. This method two loops loop simultaneous iterative reconstruction technique (SIRT) to update The outer loop interpolation and smoothing, iteration. method, this method derivative matrix has As a result, including take advantage systems in with negative truncation error, but computing for Introduction As an effective tool for first surface model building and statics calculation in complex areas and techniques in the industr traveltime tomography has been used for initial model building in prestack migration and full waveform inversion (Brenders and Pratt For first traditional calculation processes is shown in this process, we nested loops referred to as by ray tracing under the current model referred to as the traveltime residual to update the velocity model. process derivative matrix (as a file when the data size is large) during ray tracing for This process is in the industry and is uses