Abstract:

In the Interferometric SAR, the existence of the baseline error and height error of the satellite will affect the precision of the altitude information transformed from the interferometric phase. A new baseline estimation method for InSAR is proposed in this paper. This method is based on subspace projection and in this method the information about some points on the ground is used. This method needs a little amount of computation and has a high estimation precision. It is highly robust to the unwrapping phase and can restrain the noise well. Its validity is illustrated through computer simulations.

Key words: interferometric SAR, baseline, error estimation, subspace projection