Patent ID: 8217838

Claim:
A method for determining a location of a mobile terminal, comprising: receiving, via a communication satellite, a communication from a mobile terminal that includes a code phase measurement and a data phase measurement for at least one GPS satellite signal; determining a first range distance from said mobile terminal to said communication satellite; identifying a range intersection curve, said range intersection curve representing a first arc on the surface of the earth that is defined by a known position of said communication satellite and said determined range distance; identifying a code/data phase intersection curve, said code/data phase intersection curve representing a second arc on the surface of the earth that is defined by a known position of a GPS satellite and a second range distance that is consistent with said code phase measurement and said data phase measurement; determining an intersection point between said range intersection curve and said code/data phase intersection curve; identifying an initial position point based on said determined intersection point; and determining a final position of said mobile terminal using said initial position point.