Study on the Geolocation Algorithm of Space-Borne SAR Image

  • Xin Liu
  • Hongbing Ma
  • Weidong Sun
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4153)


SAR (Synthetic Aperture Radar) images have been widely used nowadays, as the SAR system is capable of scanning the earth surface objects into high resolution images. Before the SAR images are used, the geolocation step is needed to locate arbitrary pixels in an image accurately. Geolocation is very important in geometric rectification, geocoding, as well as object location and detection in the SAR image. In this paper, we propose a novel geolocation algorithm, which is a hybrid of an iterative algorithm and the conventional analytic algorithm based on Range-Doppler (RD) location model. First a new analytic algorithm adopted in our approach is presented. Next, in order to correct the geometry and terrain height, an iterative routine is integrated into the procedure. The experiment results indicate that our algorithm is efficient and can achieve higher accuracies compared with three state-of-the-art location algorithms.


Synthetic Aperture Radar Location Accuracy Local Coordinate System Pixel Location Earth Center 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Xin Liu
    • 1
  • Hongbing Ma
    • 1
  • Weidong Sun
    • 1
  1. 1.Remote Sensing Laboratory, Department of Electronic EngineeringTsinghua UniversityBeijingChina

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