The theoretical performance of different algorithms for shift estimation between SAR images

Conference: EUSAR 2018 - 12th European Conference on Synthetic Aperture Radar
06/04/2018 - 06/07/2018 at Aachen, Germany

Proceedings: EUSAR 2018

Pages: 4Language: englishTyp: PDF

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De Zan, Francesco; Prats-Iraola, Pau; Rodriguez-Cassola, Marc (German Aerospace Center (DLR), Germany)

This paper compares several algorithms for shift estimation between SAR images, presenting their performance along with their respective merits and demerits. It shows that there is a parallelism between correlation-based estimators (coherent and incoherent) and two different implementations of split-spectrum methods (Δ-k), both in terms of robustness to interferometric phase variations within the estimation window and in terms of performance. The character of Δ-k estimators is regulated by the amount of multi-looking at interferogram level and is related to the statistical efficiency of the standard estimator for the interferometric phase in case of Gaussian speckle.