Patent ID: 8125377

Claim:
A method for determining the location of a mobile device comprising the steps of: (a) receiving at a mobile device a first set of signals from a plurality of radio frequency (“RF”) sources; (b) downconverting at the mobile device the first set of signals into a second set of signals; (c) time stamping at the mobile device the second set of signals; (d) transmitting the time stamped signals from the mobile device to a location determining system; and (e) determining the location of the mobile device at the location determining system as a function of the time stamped signals and as a function of information from a wide area reference network (“WARN”), wherein the location determining system is a mobile location center (“MLC”) or a location information server (“LIS”), and wherein the information is at least one of ephemeris information, ionosphere model information, UTC model information, and combinations thereof.