Abstract: A navigation device includes a computer platform that includes a global positioning system (GPS) receiver operable to acquire and track a GPS signal, a processor assembly, and a memory. The memory includes at least one of last recorded Ephemeris and Almanac information, and a GPS velocity vector determination module operable to generate a velocity vector output in the absence of current Ephemeris based upon the tracked GPS signal and the last recorded GPS information. A method of vehicle navigation in the absence of current Ephemeris includes acquiring and tracking a GPS signal, retrieving from a memory a last recorded location of a vehicle, setting a dead reckoning startup location equal to the last recorded location, retrieving from a memory at least one of a last recorded Ephemeris and Almanac, determining a current velocity vector and determining a current location based upon the velocity vector and the dead reckoning startup location.

Abstract: A device for viewing celestial and terrestrial data having a housing with a reference axis, a database disposed in the housing and containing celestial and terrestrial data, a GPS receiver operatively coupled to the database and configured to receive a GPS signal, a processor operatively coupled to the GPS receiver and the database and configured to determine a user's location from the GPS signal, a sensor operatively coupled to the processor and adapted to provide the processor with a rotational angle representing the orientation of the housing relative to the reference axis, and a display unit operatively coupled to the processor and displays celestial and/or terrestrial data to the user corresponding to the rotational angle of the housing.

Abstract: A traffic data server wirelessly provides relevant traffic details to mobile subscribers at minimal data transmission, while supplying enough data for re-routing and detouring. Two-way wireless data connectivity allowing the server to know what data the mobile device has received in the past, allows the server to send, to a mobile device, only data that is necessary, i.e. updates to mobile users that are small data sets comprising the change in the previously received data to the current data.

Abstract: A navigation device includes a computer platform that includes a global positioning system (GPS) receiver operable to acquire and track a GPS signal, a processor assembly, and a memory. The memory includes at least one of last recorded Ephemeris and Almanac information, and a GPS velocity vector determination module operable to generate a velocity vector output in the absence of current Ephemeris based upon the tracked GPS signal and the last recorded GPS information. A method of vehicle navigation in the absence of current Ephemeris includes acquiring and tracking a GPS signal, retrieving from a memory a last recorded location of a vehicle, setting a dead reckoning startup location equal to the last recorded location, retrieving from a memory at least one of a last recorded Ephemeris and Almanac, determining a current velocity vector and determining a current location based upon the velocity vector and the dead reckoning startup location.