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Efficient and Precise Processing for Squinted Spotlight SAR through a Modified Stolt Mapping


Processing of squinted SAR spotlight data is a challenge because of the significant range migration effects of the raw data over the coherent aperture time. Although in theory the ()-algorithm takes care of these aspects, its digital implementation requires a time-consuming interpolation step. Moreover, the limited precision of this interpolation can introduce distortions at the edges of the final image especially for squinted geometries. A wave number domain processing using a modified Stolt mapping will be developed and analyzed to enhance the quality of the final SAR image. Additionally, the proposed algorithm has a decreased computational load compared to the original ()-algorithm. Simulation results will validate the focusing and efficiency performances of the modified wave number domain algorithm.


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Correspondence to Marijke Vandewal.

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Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Vandewal, M., Speck, R. & Süß, H. Efficient and Precise Processing for Squinted Spotlight SAR through a Modified Stolt Mapping. EURASIP J. Adv. Signal Process. 2007, 059704 (2006).

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  • Migration
  • Information Technology
  • Quantum Information
  • Efficiency Performance
  • Computational Load