SAR image stacking for the exploitation of long-term coherent targets

Francesco De Zan*, Paco López-Dekker

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

14 Citations (Scopus)


This letter shows that in a repeat-pass data set of synthetic aperture radar (SAR) images, a long-term coherent component, when present, can be recovered by coherent temporal filtering of the SAR images and can successively form interferograms with higher signal-to-noise ratio. The validity of the idea is confirmed through simulations and one example with real TerraSAR-X data. The theoretical necessity of using long-term interferograms is also discussed and linked to autoregressive processes, starting from the observation that the optimal weighting is given by the inverse of the covariance matrix.

Original languageEnglish
Article number5657232
Pages (from-to)502-506
Number of pages5
JournalIEEE Geoscience and Remote Sensing Letters
Issue number3
Publication statusPublished - May 2011
Externally publishedYes


  • Synthetic aperture radar interferometry


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