Communications: directive radio wave systems and devices (e.g. – Radar transponder system – Combined with primary radar system
Patent
1989-12-19
1995-01-17
Barron, Jr., Gilberto
Communications: directive radio wave systems and devices (e.g.,
Radar transponder system
Combined with primary radar system
342 45, 342357, G01S 1387, G01S 1378
Patent
active
053829573
ABSTRACT:
An improved system and method for detecting and positively identifying with nhanced IFF techniques an object or target from an interrogator platform where the area outwardly of and about the platform is suitably surveyed for detecting an object and where the platform is on the earth's surface, in the air or space so long as the platform and detected object to be identified are both within the envelope defined by the Global Position System (GPS) or the like. The system for carrying out the method can be generally made up of a GPS receiver, a programmed central processor unit and combined transceiver/antenna means. The GPS receiver of any platform after detecting an object advantageously functions to obtain the platform geoposition. Then by suitable means or by the cooperation of the programmed processor and antenna means obtain the bearing of the detected object. The detected object is then interrogated with an encrypted IFF signal as to the estimated position of the detected object. The signal also includes a region of uncertainty about the estimated position to assure positive object identification. Although the improved system has extensive military applications, it may readily be used for peaceful purposes. Because signal directivity is not required, an antenna of simple omnidirectional design may be used for any platform and object as well as any set of different frequencies for interrogating and receiving a response to the interrogation.
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Barron Jr. Gilberto
McDonnell Thomas E.
The United States of America as represented by the Secretary of
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