Cars and GPS

1. The computer has road maps stored in its system as well as GPS coordinates. The user simply tells the computer where he or she would like to go. The computer uses the GPS to determine the users current location and the coordinates of the destination. It then pulls up the appropriate maps and highlights the correct route. Several newer systems even give the user turn by turn audio directions to the destination Cars and GPS The space segment is a constellation of two dozen satellites orbiting the earth twice every 24 hours, at approximately 10,900 nautical miles above the earth's surface . These satellites are funded and controlled by the U.S. Department of Defense.