Position locating rescue transceiver
US5969673A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 13, 1998 |
| Grant date | Oct 19, 1999 |
| Priority date | — |
| Expiry date | Oct 13, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S2205/008
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.