Correction of residual motion errors in airborne repeat-pass interferometry

The usage of airborne repeat-pass single-baseline interferometry at longer wavelengths, like the L- and P-bands, is starting to be an established technique for parameter inversion studies, as well as for coherence analysis. The main limitation for a wider applicability of such data is the presence of small uncompensated motion errors, which appear as low-frequency phase modulations in the image data. Airborne repeat-pass data are therefore not useful for applications which depend on large-scale spatial or multiple-image phase relations. This includes important tasks like multi-baseline parameter inversion techniques, differential interferometry as well as high precision DEM generation. In this paper we address the effect of residual motion compensation errors in repeat-pass interferometry and propose a new technique to minimize their influence on the interferometric phase