A method and apparatus for determining a reference time associated with a satellite positioning system. In turn, the reference time, in one embodiment, may be used to determine other navigational information. Such navigational information may include, for example, the location/position of a satellite...http://www.google.co.uk/patents/US6839021?utm_source=gb-gplus-sharePatent US6839021 - Method and apparatus for determining time in a satellite positioning system
