Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1985-05-06
1985-11-26
Jordan, Charles T.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343464, 343450, 364452, G01S 124, G01S 302
Patent
active
045557071
ABSTRACT:
A system for navigation and positioning based on reception of selected components of television signals radiated synchronously from known sites. A receiving apparatus is used at the unknown location for which navigational coordinates are to be determined. The receiving apparatus receives television signals and measures the time intervals between receptions of selected signal components. The time interval data are used with other known data to derive hyperbolic lines of position in accordance with established conventions and techniques and the hyperbolic lines define the location of the receiving apparatus. The system serves any number of users simultaneously.
REFERENCES:
patent: 3262111 (1966-07-01), Graham
patent: 3613095 (1971-10-01), Elwood
patent: 3886553 (1975-05-01), Bates
patent: 4047175 (1977-09-01), Taira et al.
G. Kamas & S. Howe, Time and Frequency Users Manual, U.S. Dept. Commerce/National Bureau Standards Publication 559, Nov. 1979.
Barron Harry W.
Jordan Charles T.
Malin Eugene F.
Steinberger Brian S.
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