Communications: directive radio wave systems and devices (e.g. – Directive – Position indicating
Patent
1994-08-31
1998-05-05
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Directive
Position indicating
342357, G01S 302
Patent
active
057481474
ABSTRACT:
A secure, portable position locating radio has a geolocation receiver providing local position and timing information from geolocation means (e.g. GPS satellites) and a local transceiver for sending local position information to a communication system (e.g., an airborne or orbiting transceiver). A crypto unit is provided between the receiver and local transceiver for encrypting the local position information prior to transmission. A data processor coupled to the local transceiver, receiver and crypto unit controls operation of the device, including storing local position information and separating signals broadcast by the communication system into those intended or not intended for the device. An external interface and display and a real-time clock (e.g., slaved to the GPS receiver) are also coupled to the data processor. Encryption keys and message abbreviation codes are conveniently loaded into the device from a demountable accessory unit at the interface, and stored therein.
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Aragaki Taul
Bickley Robert Henry
Moy Leland Lem
Waddoups Ray Owen
Blum Theodore M.
Botsch Sr. Bradley J.
Fliegel Frederick M.
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