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The invention comprises an apparatus for distribution and delivery of the Global Positioning System (GPS) satellite ephemeris using a communication link between a central Site and a wide area network of GPS receivers. The wide area network of GPS receivers collects the ephemeris data that is transmitted by the Satellites and communicates the data to the central site. The central site delivers the ephemeris to the mobile receiver. The mobile GPS receiver uses the delivered data to enhance its Sensitivity in two ways. First, the data allows the receiver to detect very weak Signals that the receiver would not ordinarily be able to detect, and Second, the GPS receiver does not have to track the satellite signals for very long before a position can be calculated. In one embodiment of the invention, the Satellite ephem eris data is retransmitted without manipulating the data in any way. The GPS receiver may then use this …