Interferometric SAR (InSAR) systems are able to estimate height profiles of the Earth surface. For the involved estimation problem, Maximum A Posteriori (MAP) statistical technique and Markov Random Field image models have been used, showing to be effective in case of multiple interferograms, obtained via different baselines/frequencies. In this paper, we face the problem of unknown phase offsets presence affecting real interferograms, which makes impossible to retrieve correct height estimations. We present a procedure to estimate these offset values, based on statistical estimation and we test it both on simulated and real data, showing the effectiveness of the method.
Offset Phase Estimation in Multi-Channel InSAR DEM Reconstruction
FERRAIOLI, GIAMPAOLO;PASCAZIO, Vito
2007-01-01
Abstract
Interferometric SAR (InSAR) systems are able to estimate height profiles of the Earth surface. For the involved estimation problem, Maximum A Posteriori (MAP) statistical technique and Markov Random Field image models have been used, showing to be effective in case of multiple interferograms, obtained via different baselines/frequencies. In this paper, we face the problem of unknown phase offsets presence affecting real interferograms, which makes impossible to retrieve correct height estimations. We present a procedure to estimate these offset values, based on statistical estimation and we test it both on simulated and real data, showing the effectiveness of the method.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.