Hybrid GPS/data line unit for rapid, precise, and robust position determination

  • US 5,365,450 A
  • Filed: 12/17/1992
  • Issued: 11/15/1994
  • Est. Priority Date: 12/17/1992
  • Status: Expired due to Term
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First Claim
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1. In a global positioning system (GPS) in which a plurality earth orbiting GPS satellites transmit position information to mobile radio stations on earth including a Satellite Data Message block, the improvement comprising:

  • an earth based source of satellite data for all in-view GPS satellites including said Satellite Data Message blocks for each in-view satellite for assisting said mobile radio station to access position information from said satellites, and an earth based communication means coupled to said source,means coupled to said mobile radio station for connecting to said earth based communication means to said earth-based source for extricating said satellite position data via said non-satellite earth based communication means, andmeans at said mobile for processing said Satellite Data Message blocks from said earth-based source to enable said mobile radio station to rapidly locate and access position information from said earth orbiting satellite.

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