An apparatus for distribution and delivery of global positioning system (GPS) satellite telemetry data using a communication link between a central site and a mobile GPS receiver. The central site is coupled to a network of reference satellite receivers that send telemetry data from all satellites to...http://www.google.com/patents/US20020105459?utm_source=gb-gplus-sharePatent US20020105459 - Apparatus for locating mobile receivers using a wide area reference network for propagating ephemeris
Apparatus for locating mobile receivers using a wide area reference network ...
