Position locating rescue transceiver

US5748147A · kind A · utility

Inventors

• Robert H. Bickley · Paradise Valley, US
• Taul Eric Aragaki · Scottsdale, US
• Leland Lem Moy · Scottsdale, US
• Ray O. Waddoups · Valencia, US

Key dates

• Filing date: Aug 31, 1994
• Grant date: May 5, 1998
• Expiry date: Aug 31, 2014

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S2205/008
• WIPO field: Measurement
• WIPO sector: Instruments

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.