Interferogram images derived from spaceborne synthetic aperture radar system exhibit artifacts due to noise and atmospheric effects

which may mitigate the accuracy of the result DEM. In this paper

we present a method to combine uncorrelated topographic profiles generated by multi-temporal interferometric SAR data

this weighted combination is carried out in wavelet domain

which estimates the distortion power

of noise and atmosphere and improves the accuracy of final DEM with interferofram images of Shangyi area

Hebei province as test data.