GENERATION OF DIGITAL ELEVATION MODELS BY USING SIR-C X-SAR MULTIFREQUENCY 2-PASS INTERFEROMETRY - THE ETNA CASE-STUDY/

In this paper, we exploit the interferometric multifrequency potential ity of the SIR-C/X-SAR system which is equipped with an L-, C-, and X- band sensor, We present a solution to improve the unwrapping performan ce of the C- and X-band data by considering the L-band unwrapped patte rn, A new algorithm for the generation of a single digital elevation m odel (DEM) combining L-, C-, and X-band information is presented, This solution is based on the fusion of the unwrapped phase patterns by us ing a Kalman filter, The proposed fusion operation also accounts for t he coherence characteristics of the three data sets, The selected test site is the Mt, Etna region in Italy which is very interesting from t he volcanological and geological point of view, Numerical assessments of the achieved results are provided by evaluating the height accuracy with respect to a reference DEM.