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

Abstract

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 (https://doi.org/creativecommons.org/licenses/by/2.0), 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). https://doi.org/10.1155/2007/59704

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Keywords

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