Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1978-06-02
1980-04-08
Hubler, Malcolm F.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343 5EM, G01S 722, G01S 956
Patent
active
041975383
ABSTRACT:
A pictorial display system in which continuously updated images of `other ship` aircraft within a specified airspace envelope are superimposed on a map display along with the pilot's `own ship` position, whereby collision threats are avoided by taking corrective flight action. This information is displayed, independently of and without interfering with ground facilities operations and communications, as a response to a low-powered signal transmitted from an onboard FM transceiver-multiplexer unit in which the response in terms of positions and altitudes of other aircraft in electrical form, is received, demodulated and then transformed into digital form. Such digital information along with "own ship" position and altitude in digital form, are fed into an altitude discriminator synchronizer unit. The "own ship" altitude data from existing on-board equipment, is synchronized in digital form with other aircrafts' altitude data; and likewise, the "own ship" navigational data, obtained through existing navigational equipment, is also converted to digital form and is synchronized. All of this synchronized digital information is then applied to a function generator which formats it into a form compatible with the requirements of the pictorial display. This display presents the data to the pilot who is then able to properly manuever the aircraft to achieve safe control thereof in relation to other aircraft, or take the necessary collision avoidance action relative to another aircraft, as the case may be.
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patent: 3717873 (1973-02-01), Riggs
Hubler Malcolm F.
Zugelter Frank L.
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