Near-field discrete-frequency microwave holographic imaging of buried ordnance

James T. Nilles; Gus P. Tricoles; Gary L. Vance

doi:10.1117/12.241239

31 May 1996 Near-field discrete-frequency microwave holographic imaging of buried ordnance

James T. Nilles, Gus P. Tricoles, Gary L. Vance

Proceedings Volume 2765, Detection and Remediation Technologies for Mines and Minelike Targets; (1996) https://doi.org/10.1117/12.241239
Event: Aerospace/Defense Sensing and Controls, 1996, Orlando, FL, United States

Abstract

Images of buried ordnance can accelerate remediation through identification. This paper presents images of a buried, inert projectile. The images are plan views, at fixed but variable depths. The images were formed by processing measured reflectance through Fourier transformation, backward propagation, and inverse transformation. Data were measured in two tests. Both tests utilized a towed array of seven antennas. One test, in 1995, used frequencies between 187.5 and 487.5 MHz; the best images were from the 387.5 MHz data. An earlier test, in 1994, used frequencies 200, 350, and 500 MHz; the best images were formed from the 500 MHz data. The procedures for the two sets of data differed in relative orientation of the sensor antennas and projectile; in addition, soil dielectric constant values differed. Image displays also differed in image data interpolation.

Citation Download Citation

James T. Nilles, Gus P. Tricoles, and Gary L. Vance "Near-field discrete-frequency microwave holographic imaging of buried ordnance", Proc. SPIE 2765, Detection and Remediation Technologies for Mines and Minelike Targets, (31 May 1996); https://doi.org/10.1117/12.241239

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