AN IMPROVED INSAR BASELINE ESTIMATION BASED ON INTERFEROMETRIC FRINGE FREQUENCY

Baseline is an essential parameter in Interferometric SAR (InSAR). It’s directly related to the estimation accuracy of elevation, so precise baseline estimation is required. Aiming at the existing baseline estimation methods based on interferometric fringe frequency, this paper proposes an improved baseline estimation method based on least square. Compared with the existing methods, the proposed method can fully exploit the potential of the interferogram data by applying the least square method to solve the formula between fringe frequency and baseline parameter to achieve baseline estimation. The simulated results show that the proposed method has improved performance in both accuracy and robustness for InSAR baseline estimation.