An Improved Iteration Method for Downward Continuation of Potential Fields

摘要

Based on integral iteration idea and iterative formula in wave number domain, an improved iteration method is proposed for downward continuation of potential fields. We present a method for estimating iterative number, according to the expression of absolute value of difference of two successive iterations. The improved method is tested on both model and real observation data. The results show that new method is faster than iteration method. The cost is almost equal to that of iteration method within one iterative process. New method also gives good results for downward continuation.