Topography-dependent motion compensation for repeat-pass interferometric SAR systems

Pau Prats, Andreas Reigber, Jordi J. Mallorqui

Research output: Contribution to journalArticleResearchpeer-review

91 Citations (Scopus)


This letter presents a new motion compensation algorithm to process airborne interferometric repeat-pass synthetic aperture radar (SAR) data. It accommodates topography variations during SAR data processing, using an external digital elevation model. The proposed approach avoids phase artifacts, azimuth coregistration errors, and impulse response degradation, which usually appear due to the assumption of a constant reference height during motion compensation. It accurately modifies phase history of all targets before azimuth compression, resulting in an enhanced image quality. Airborne L-band repeat-pass interferometric data of the German Aerospace Center experimental airborne SAR (E-SAR) is used to validate the algorithm. © 2005 IEEE.
Original languageEnglish
Pages (from-to)206-210
JournalIEEE Geoscience and Remote Sensing Letters
Publication statusPublished - 1 Apr 2005


  • Calibration
  • Image registration
  • Interferometry
  • Motion compensation
  • Repeat-pass interferometry
  • Synthetic aperture radar (SAR)


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