A method of dynamically optimizing the update rate of GPS output data has acts of setting relationships between different moving speeds and different update rates; sensing a current moving speed of a GPS receiver; determining a update rate corresponding to the current moving speed of the GPS receiver;...http://www.google.de/patents/US20090273513?utm_source=gb-gplus-sharePatent US20090273513 - METHOD OF DYNAMICALLY OPTIMIZING THE UPDATE RATE OF GPS OUTPUT DATA