SAR focusing using multiple trihedrals

Kerry E. Dungan; John W. Nehrbass

doi:10.1117/12.2015088

23 May 2013 SAR focusing using multiple trihedrals

Kerry E. Dungan, John W. Nehrbass

Proceedings Volume 8746, Algorithms for Synthetic Aperture Radar Imagery XX; 874606 (2013) https://doi.org/10.1117/12.2015088
Event: SPIE Defense, Security, and Sensing, 2013, Baltimore, Maryland, United States

Abstract

A recent circular synthetic aperture radar data collection contained various vehicles and calibration targets placed throughout a 5 km scene. By observing multiple orbits of the radar, the down-range distance measurements to scattering features show noticeable drift on the order of 2 m from orbit to orbit. The large scene contained 14 quad-trihedral calibration targets with radar cross sections that are similar to point targets in the elevation range of the scene. This paper presents an algorithm that uses the quad-trihedrals to generate global range focusing parameters and phase error corrections to the complex range profile. Qualitative and quantitative results show the focusing provides a significant improvement to wide-angle image registration and vehicle target discrimination.

Citation Download Citation

Kerry E. Dungan and John W. Nehrbass "SAR focusing using multiple trihedrals", Proc. SPIE 8746, Algorithms for Synthetic Aperture Radar Imagery XX, 874606 (23 May 2013); https://doi.org/10.1117/12.2015088

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