Improvement of the accuracy of InSAR image co-registration based on tie points - A review

Weibao Zou, Yan Li, Zhilin Li, Xiaoli Ding

Research output: Journal article publicationReview articleAcademic researchpeer-review

17 Citations (Scopus)


Interferometric Synthetic Aperture Radar (InSAR) is a new measurement technology, making use of the phase information contained in the Synthetic Aperture Radar (SAR) images. InSAR has been recognized as a potential tool for the generation of digital elevation models (DEMs) and the measurement of ground surface deformations. However, many critical factors affect the quality of InSAR data and limit its applications. One of the factors is InSAR data processing, which consists of image co-registration, interferogram generation, phase unwrapping and geocoding. The co-registration of InSAR images is the first step and dramatically influences the accuracy of InSAR products. In this paper, the principle and processing procedures of InSAR techniques are reviewed. One of important factors, tie points, to be considered in the improvement of the accuracy of InSAR image co-registration are emphatically reviewed, such as interval of tie points, extraction of feature points, window size for tie point matching and the measurement for the quality of an interferogram.
Original languageEnglish
Pages (from-to)1259-1281
Number of pages23
Issue number2
Publication statusPublished - 1 Feb 2009


  • Co-registration
  • InSAR
  • Interferogram
  • Interval of tie points
  • Window size

ASJC Scopus subject areas

  • Analytical Chemistry
  • Atomic and Molecular Physics, and Optics
  • Biochemistry
  • Electrical and Electronic Engineering


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