Calibration of the ARL boomSAR using rigorous scattering models for fiducial targets over ground

Marc A. Ressler; Barbara L. Merchant; David C. Wong; Lam H. Nguyen; Norbert Geng; Lawrence Carin

doi:10.1117/12.354605

20 July 1999 Calibration of the ARL boomSAR using rigorous scattering models for fiducial targets over ground

Marc A. Ressler, Barbara L. Merchant, David C. Wong, Lam H. Nguyen, Norbert Geng, Lawrence Carin

Proceedings Volume 3704, Radar Sensor Technology IV; (1999) https://doi.org/10.1117/12.354605
Event: AeroSense '99, 1999, Orlando, FL, United States

Abstract

The Army Research Laboratory synthetic aperture radar system is placed atop a boom lift, and therefore the system is termed a `BoomSAR'. The UWB character of this system, covering a frequency spectrum from 40 - 1200 MHz, makes accurate polarimetric calibration a nontrivial matter. The response of the standard trihedral fiducial target is poorly understood at VHF and UHF frequencies, for which the wave interaction with the soil can be an important issue. Here we employ a rigorous method-of-moments analysis of UWB scattering from a trihedral reflector over ground. The soil is modeled as a lossy, dispersive half space, accounted for rigorously via the half-space Green's function. The numerical algorithm is used to evaluate the angle-dependent, polarimetric frequency dependence of scattering from a trihedral target, at VHF and UHF frequencies. This comprehensive study of UWB scattering from a trihedral over soil is critical for system calibration.

Citation Download Citation

Marc A. Ressler, Barbara L. Merchant, David C. Wong, Lam H. Nguyen, Norbert Geng, and Lawrence Carin "Calibration of the ARL boomSAR using rigorous scattering models for fiducial targets over ground", Proc. SPIE 3704, Radar Sensor Technology IV, (20 July 1999); https://doi.org/10.1117/12.354605

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