InSAR Baseline Estimation Based on Co-registration Offsets

In this paper,a new baseline estimation method based on the principle of SAR interferometry is proposed.It uses co-registration offsets and non-linear least square algorithm to estimate the interferometric baseline.We apply it to estimating the baseline of two ENVISAT SLC images covering Tibet,China.The results demonstrate that the algorithm can effectively estimate the baseline,reduce the errors due to the inaccurate orbits data and therefore improve the accuracy of DEM generated by InSAR.