A technique to achieve output tracking for nonminimum phase linear systems with non-hyperbolic and near non-hyperbolic internal dynamics is presented. This approach integrates stable inversion techniques, that achieve exact-tracking, with approximation techniques, that modify the internal dynamics to achieve desirable performance. Such modification of the internal dynamics is used (a) to remove...

We develop an algorithm for inverting gravity data to construct estimates of the base of salt and investigate the sensitivity of the recovered model to four different sources of errors. The inversion algorithm is based on the approach of Tikhonov regularization.The prior information is typically shape and depth of the top salt and of a known part of base salt from seismic image. The error in su...