System and method for detecting, locating and identifying objects located above the ground and below the ground in a pre-referenced area of interest
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United States of America Patent
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Aug 13, 2013
Grant Date -
Feb 17, 2011
app pub date -
Jan 2, 2009
filing date -
Jan 4, 2008
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The invention relates to a system and method for detecting, locating and identifying objects located above ground or below ground in an area of interest, comprising an airborne vehicle which circumscribes the area of interest and which includes a built-in radar having an antenna with a respective transmitter and receiver, signal-processing means, data-storage means and graphical interface means. According to the invention, the area of interest has been pre-referenced and the radar is a heterodyne ground penetration radar (GPR). The signal transmitted by the antenna generates a beam that illuminates a strip of earth, consisting of a sinusoidal electromagnetic signal having a frequency that is varied in precise pre-determined progressive steps. This signal is mixed with the received (reflected) signal, thereby producing two sets of values corresponding to the phases of each frequency step or stage. Said sets of values, which are obtained throughout successive sweeps (as the antenna moves), are stored in the storage means and subsequently processed in the processing means in order to obtain a final map or image of the location of the objects above ground or below ground.
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