Approximation of the bistatic slant range using Chebyshev polynomials

Carmine Clemente, John Soraghan

Research output: Contribution to journalLetterpeer-review

16 Citations (Scopus)


The effectiveness of frequency domain processing algorithms in bistatic synthetic aperture radar (SAR) focusing depends critically on the accuracy of the bistatic slant range function approximation. This letter presents a new Chebyshev slant range function approximation that is shown to increase the accuracy of the analytical approximation of the bistatic point target spectrum. The performance of the new method is compared to the conventional Taylor series approximation approach in the generation of the point target spectrum. The new approach is shown to provide a more accurate approximation of the slant range function with negligible increase in processing requirements compared to the traditional Taylor series approximation. The accuracy improvement is shown to yield a more accurate spectrum that can be exploited in bistatic SAR focusing algorithms.

Original languageEnglish
Pages (from-to)682-686
Number of pages5
JournalIEEE Geoscience and Remote Sensing Letters
Issue number4
Publication statusPublished - 1 Jul 2012


  • Chebyshev polynomials
  • bistatic slant range
  • remote sensing


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