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 Land Mine Detection System

       METRATEK is applying  advanced RCS measurement technology to the problem of discriminating land mines from their surroundings. This is an extremely difficult task for conventional magnetic mine detectors because most modern mines have little or no metal in them. However, radar can detect the difference in the dielectric properties of plastic mines and the surrounding soil in many cases, and radar images can be used to identify mines from other objects. METRATEK radars employ a frequency-domain ultra-wideband waveform that can be compensated on a frequency-by-frequency basis for soil conditions.                  The Model 200 radar has been used to produce the 2-D and 3-D Synthetic Aperture Radar (SAR) images shown below. The target is an Italian VS-2.2 antitank mine, which was liberated from Kuwait. This mine is about 12 inches in diameter and its total metal content is a firing pin that is about the size of a ball-point pen point.

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      This  2-D image shows the VS 2.2 mine buried in a sand box. The mine is visible just above and to the right of the word ``mine" in the center of the image. The horizontal lines  of targets (from top to bottom) are the surface of the sand. the bottom of the sand box, the floor under the sand box, and a double bounce between the floor and the bottom of the sand box. This mine is clearly visible because the SAR processing resolves it from the strong returns produces by the surface of the sand. This image  has 1.5-cm resolution.

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      This 3-D image shows the radar return as it propagated down through the plastic VS 2.2 mine. In this case, the mine was measured in air with the Model 200 radar looking down from the top of  the mine at a distance of about 6 feet. Each image at the left was generated with SAR processing in the x and y planes, and each individual image represents a range slice through the mine from top (at the upper left corner) to bottom (lower right corner). The Model 200 radar was operated at 12-18 GHz, producing 6 GHz bandwidth and 1.5-cm range resolution. There are 134.2 million picture elements in the full image, which was processed on a Pentium personal computer.

mineepic

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   Mines Measured by METRATEK

3-D  SAR Mine Imaging Test Bed

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Mobile SAR Mine Detection System

      This mobile version of the Model 200 radar operates as an mobile ultra-wide band 3-D SAR  mine detection system. This unit uses broad band horns that allow it to cover 2-16 GHz. The 3-D SAR processing software has unique capabilities that are designed to enhance the probability of isolating underground targets from surface returns.

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