Patent ID: 8630796

Claim:
A location determination system, comprising a communication satellite; a mobile terminal, including a processor that controls a collection of code phase measurements from signals received from a plurality of GPS satellites, and an identification of an area of interest from a terrestrial based wireless signal communicating over said area of interest in which said mobile terminal resides, said area of interest being smaller than a convergence zone area, wherein a size of said convergence zone area is a size of an area around a current location of a mobile terminal in which an initial position point must lie to guarantee that an iterative position calculation starting with said initial position point will converge to said current location of said mobile terminal, and a transmitter for transmission of said code phase measurements and said identification of said area of interest to said communication satellite; and a service operations center that receives said plurality of code phase measurements and said identification of said area of interest from said communication satellite, said service operations center including a position calculation module that iteratively calculates a position solution using said plurality of code phase measurements starting with a selected initial position point in said area of interest, wherein identification of said area of interest guarantees that a final position point produced by said position calculation module, after starting with said selected initial position point, is said current location of said mobile terminal, wherein said position calculation module performs an iterative calculation on only a single candidate location point.