Radar selective interrogation system

Details Radar selective interrogation system Radar selective interrogation system

1977-05-12

1979-01-30

Wilbur, Maynard R.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

G01S 956

Patent

active

041375319

ABSTRACT:
An aircraft ground movement monitoring system is provided similar to that described in co-pending U.S. patent application Ser. No. 608,214, now U.S. Pat. No. 4,109,248, that makes use of an aircraft's existing SSR transponder in a hyperbolic selective interrogation technique to monitor an aircraft's position on an airfield in which, in order to overcome the problems particularly involving spurious mode C (height) interrogations that arise in long base-line systems, it is arranged that transponders that would be spuriously interrogated are interrogated first and that the required transponder is interrogated before the already interrogated transponders have finished replying.

REFERENCES:
patent: 3870994 (1975-03-01), McCormick et al.
patent: 4011562 (1977-03-01), Bruce

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