This tutorial from Trimble is a little more detailed: http://www.trimble.com/gps/index.shtml http://www.trimble.com/gps/index.shtml The really interesting inno

This tutorial from Trimble is a little more detailed: http://www.trimble.com/gps/index.shtml http://www.trimble.com/gps/index.shtml The really interesting innovation in GPS is the way they use a priori information about each satellite's signal to "amplify" the signal by processing: http://www.trimble.com/gps/sub_amplify.shtml http://www.trimble.com/gps/sub_amplify.shtml