A Modified Goldstein Algorithm for InSAR Interferogram Filtering

An algorithm for filtering InSAR phase noise and preserving details of interferometric fringes is proposed,which improves Goldstein filtering parameter α and considers function of standard deviation of phase to be parameter.The standard deviation of phase shows phase noise effectively.According to degree of interferogram phase noise,the method can determine degree of filter strength.The modification can make the local area with strong noise strongly filtered,while those with week noise weekly filtered.Experimental results with both the simulated data sets and the real one show that the new method can improve filtering effect and enhance the local adaptability of the filter and fidelity details of interferometric fringes.