Patent ID: 8085193
Filing Date: 2011-12-27
Classification: G01S

Abstract:
1. A method for estimating the location of a wireless device comprising the steps of: (a) determining a set of satellites as a function of an approximate area in which the wireless device is located; (b) transmitting assistance data to said device, said assistance data including information from said set of satellites and Real Time Integrity assistance data; (c) modifying said Real Time Integrity assistance data by identifying one or more healthy satellites in said set of satellites as unhealthy or bad; (d) receiving said modified transmitted assistance data by said device; (e) preventing said device from searching for and acquiring signals from said identified one or more healthy satellites as a function of the modified Real Time Integrity assistance data; and (f) estimating a location of the device from said information exclusive of information from said identified one or more healthy satellites.