Collision avoidance/proximity warning system using secondary rad

Details Collision avoidance/proximity warning system using secondary rad Collision avoidance/proximity warning system using secondary rad

1975-05-09

1977-05-31

Hubler, Malcolm F.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343112CA, G01S 956

Patent

active

040273075

ABSTRACT:
Proximity indication and evaluation of mobile vehicles, using the signals emitted by the hundreds of existing secondary radar ground stations and the nearly 100,000 cooperating transponders on the vehicles, to detect intrusion in a monitored proximity volume and to determine slant range and/or relative bearing to the intruder.

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