Communications: directive radio wave systems and devices (e.g. – Directive – Including directive communication system
Patent
1996-12-30
2000-11-14
Issing, Gregory C.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including directive communication system
34235709, H04B 7185
Patent
active
061476447
ABSTRACT:
A system and method for transmitting information to a receiving station via one or more Low Earth Orbit (LEO) satellites includes a device which is capable of operating autonomously to transmit signals to a selected LEO satellite for relay to a receiving station identifying the device and its geolocation including longitude and latitude and/or speed, altitude and heading or course. The device includes a microprocessor which operates a Global Positioning System (GPS) receiver for receiving GPS signals to identify its geolocation and precise time. A nonvolatile memory onboard the device stores LEO satellite ephemeris data, and identification, operational and message formatting information to enable the device to transmit information including voice, data and/or the geolocation of the device to a selected LEO satellite, such as the next visible LEO satellite, for relay to a receiving station. The device may be operated to select the next visible LEO satellite for transmission of information when the satellite is visible and the device is within the LEO satellite visibility range or footprint. Alternatively, the device may select one or more LEO satellites for transmission at selected times and may store information, including geolocation data, when a selected LEO satellite is visible.
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Boyd, Jr. Austin Walker
Castles Milford Pike
Moryl James Andrew
Issing Gregory C.
Southwest Research Institute
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