Method for sensing a threat
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United States of America Patent
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May 15, 2012
Grant Date -
Jan 29, 2009
app pub date -
Jan 30, 2007
filing date -
Feb 2, 2006
priority date (Note) -
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Abstract
A method employed for threat analysis based on the passive-radar principle, using the transmitter in navigation satellites, a plurality of receiving stations, which are operated distributed over wide regions, and at least one evaluation center. The receiving stations act as wake-up sensors, transmit their received signals to at least one evaluation center for comparison with expected signals from each navigation satellite and sensing of a threat. Depending on the result, radar systems are operated on a stationary or mobile basis, can then be used with their higher-quality antenna systems on a three-dimensional basis to obtain more precise details relating to a conspicuous entity and the threat which may possibly originate from it in a possible target region or to a mobile or stationary threatened object, and then to make it possible to decide on any currently required protective or defensive measures.
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