Secondary surveillance radar and its interrogation...

Details Secondary surveillance radar and its interrogation... Secondary surveillance radar and its interrogation...

2005-09-07

2008-08-05

Gregory, Bernarr E (Department: 3662)

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

Air traffic control

Secondary surveilance radar

C342S029000, C342S030000, C342S032000, C342S036000, C342S175000, C342S195000

Reexamination Certificate

active

07408498

ABSTRACT:
An interrogation transmission method of a secondary surveillance radar compares prediction angle ranges for transmitting interrogations with a beam-width of an antenna, and transmits the interrogations at every roll-call period if the prediction angle ranges for transmitting interrogations are narrower than the beam-width of the antenna. In contrast, if the prediction angle ranges for transmitting the interrogations are wider than the beam-width of the antenna, the radar respectively sets a period to transmit the interrogations and a period not to transmit the interrogations until responses can be received, and transmits interrogations at every roll-call period after the responses can be received (even if a receiving error or downlink occurs).

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John L. Baker, et al., “Mode S System Design and Architecture”, Proceedings of the IEEE, vol. 77, No. 11, XP-000101183, Nov. 1, 1989, pp. 1684-1694.
M. C. Stevens, “Secondary Surveillance Radar”, Secondary Surveillance Radar, XP-002154909, 1988, pp. 168-171 and pp. 250-275.
“Revision Radar Technique”, Institute of electronics, Information and Communication Engineers, 1996, pp. 227-233.
Michael C. Stevens, Secondary Surveillance Radar, ISBN 0-89006-292-7, 1988.

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