System for detecting underground objects

Communications: directive radio wave systems and devices (e.g. – Transmission through media other than air or free space

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342 25, G01S 1390, G01V 312

Patent

active

048313831

ABSTRACT:
A system for detecting underground objects is disclosed wherein image data obtained through a deep range-migration correction and image data obtained through a shallow range-migration correction are combined so that data at the corresponding positions on both the image data at high level may mutually intensify, whereas other data may mutually weaken. The target spot on the thus combined image data is made sharp and provides sufficently high resolution.

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patent: 4706031 (1987-11-01), Michiguchi et al.
Usami et al., "Detection of the Underground Pipes by Synthetic Aperture Techniques", Transactions of the IECE of Japan, vol. E 69, No. 4, Apr. 1986, pp. 491-493.
Volakis et al., "Improved Identification of Underground Targets Using Video Pulse Radars by Elimination of Undesired Natural Resonances", IEEE Transactions on Antennas and Propagation, vol. AP-31, No. 2, Mar. 1983, pp. 334-340.
Iizuka et al., "Detection of Nonmetallic Buried Objects by a Step Frequency Radar", Proceedings of the IEEE, vol. 71, No. 2, Feb. 1983, pp. 277-280.
"Survey on Underground Object by Means of Radio Wave", Proceedings of the Institute of Electronics and Communication Engineers of Japan, vol. 67, No. 3, Mar. 1984, pp. 308-311.

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