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| Research & Development of Passive Secondary Surveillance Radar (PSSR) |
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| Passive SSR is a system that receives the reply signal from the aircraft, and calculates the flight position without any interrogation signal under coverage of another SSR. PSSR is a very small system that can be operated with battery. It is then expected to be used in various fields. |
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The principle of PSSR
Figure above shows the positions of a Master SSR (T), an Aircraft (A) and a PSSR (R). When it is possible to receive both of "interrogation signal from the master SSR" and "reply signal from the target aircraft," the PSSR can calculate the position of target aircraft from the difference between propagation times of two signals. |
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The trajectory of aircraft obtained by prototype of PSSR
The figure shows a track of the aircraft that flew around the Centrair airport. The displayed target symbol was expanded because of the beam width of the interrogation. |
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Reserch Group
(staff) |
Kakuichi Siomi,Atsushi Senoguchi |
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