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Enhanced global navigation satellite system

  • US 6,201,497 B1
  • Filed: 09/19/1998
  • Issued: 03/13/2001
  • Est. Priority Date: 09/30/1997
  • Status: Expired due to Term
First Claim
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1. Apparatus to determine the position of a GPS receiver separated by a line-of-sight barrier from a global navigational system having a plurality of satellites orbiting the earth, each of said satellites transmitting distinct navigational signals, comprisinga first antenna for receiving said navigational signals from said satellites, a receiver/processor coupled to said first antenna, said receiver/processor calculating location and navigation information from said navigational signals, a signal identifier coupled to the first antenna, said signal identifier identifying said navigational signals received by said first antenna and separating said navigational signals received by said first antenna into a multiplicity of separate data signals, each of said separate data signals identical to one of said distinct navigational signals transmitted by said plurality of satellites, a plurality of broadcast antennae disposed within said line-of-sight barrier at fixed, predetermined locations, each of said broadcast antennae coupled to said signal identifier to receive one of said separate data signals, each of said separate data signals broadcast by one of said individual broadcast antennae distinct from said other of said data signals transmitted by said other of said individual broadcast antennae, said signal identifier causing each of said broadcast antennae to broadcast said identified navigational signals in a manner distinguishable from the broadcast of said identified navigational signals by the other of said broadcast antennae, a first computer coupled to said GPS receiver to receive said separate data signals received by said GPS receiver, said first computer coupled to said receiver/processor to receive location and navigation information therefrom, said first computer programmed to calculate a navigational result from each of said identified signals received by said GPS receiver and from said location and navigation information from said receiver/processor.

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