Patent ID: 6696942
Filing Date: 2004-02-24
Classification: G08B

Abstract:
An emergency warning system, comprising:a base station for broadcasting a warning signal; a first, earth-orbiting satellite for receiving said warning signal and rebroadcasting such so as to extend the range of communications of said base station; a first substation for receiving said warning signal from said first, earth-orbiting satellite and for broadcasting a first forwarding signal in response thereto; a first portable receiver for receiving said first forwarding signal from said first substation; a second substation for receiving said warning signal from said first, earth-orbiting satellite and for broadcasting a second forwarding signal in response thereto; a second, earth-orbiting satellite for receiving said second forwarding signal and rebroadcasting such so as to extend the range of communications of said second substation; a first branch station for receiving said second forwarding signal from said second, earth-orbiting satellite and for broadcasting a third forwarding signal in response thereto; a second portable receiver for receiving said third forwarding signal from said first branch station; a second branch station for receiving said second forwarding signal from said second, earth-orbiting satellite and for broadcasting a fourth forwarding signal; and, a third portable receiver for receiving said fourth forwarding signal from said second branch station.