Communications: directive radio wave systems and devices (e.g. – Directive – Including a satellite
Patent
1989-07-13
1990-12-04
Tarcza, Thomas H.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a satellite
342354, H04B 7185
Patent
active
049757075
ABSTRACT:
A locating system employs a multiple satellite configuration employing rotating scanning patterns for generating peak signal data which can be used to calculate the position of a signal source within a scanned region. One preferred embodiment utilizes two spaced satellites in high earth geosynchronous orbit and simultaneous narrow antenna beam rotation patterns to scan a substantial portion of the earth's surface. The invention is particularly advantageous for locating stolen vehicles and for tracking inventory. The system may also be used for determining altitude of a signal source that may, for example, be located on an aircraft in flight.
An alternative embodiment employs a peak-detecting ground-based receiver and satellite or other scanning devices which generate and transmit a signal to the receiver indicating the precise current position of the antenna of each satellite. The ground-based receiver is equipped with a computer for calculating its own position by repeatedly correlating the time of peak signal detection and the data from the received satellite signals. Such an alternative embodiment would enable precise self-position determination without the use of a command center.
REFERENCES:
patent: 3303499 (1967-02-01), Mahoney et al.
patent: 3699577 (1972-10-01), Shadle
patent: 3852763 (1974-12-01), Kreutel, Jr. et al.
patent: 4161730 (1979-07-01), Anderson
patent: 4494119 (1985-01-01), Wimbush
patent: 4819053 (1989-04-01), Halavais
Energetics Satellite Corporation
Hellner Mark
Tachner Leonard
Tarcza Thomas H.
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