Collision avoidance system for aircraft

Details Collision avoidance system for aircraft Collision avoidance system for aircraft

1984-06-14

1987-03-10

Buczinski, Stephen C.

Communications: directive radio wave systems and devices (e.g.,

Radar transponder system

Iff or sif

342455, 342 42, G01S 956

Patent

active

RE0323683

ABSTRACT:
A collision avoidance system for aircraft in which one aircraft is equipped with an interrogation station having a secondary surveillance radar. [Coarse] A distance measurement is effected either by passive or active distance measurement or by both of them. If the detected distance lies within a certain limit, the output power and/or period of the interrogation signal of the secondary surveillance radar of the subject aircraft is altered [so as to effect fine distance measurement]. This system can be applied without increasing interference against the existing secondary surveillance radar system by keeping the output power and period of interrogation signal in a minimum required extent. By the same reason the system can keep the interference at a small extent between proximate aircraft, each mounting this collision avoidance system.

REFERENCES:
patent: 3750168 (1973-07-01), Schrader
patent: 3757324 (1973-09-01), Litchford
patent: 3772691 (1973-11-01), Hansen

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