The Global Positioning System

This site presents information about the Global Positioning System (GPS), including basic information, images, and plentiful in-depth technical information about GPS. Topics covered include U.S. Department of Defense Satellite Navigation System, GPS Positioning Services Specified in the Federal Radionavigation Plan, GPS Satellite Signals, GPS Data, Position and Time from GPS, GPS Error Sources, Geometric Dilution of Precision, and Differential GPS Techniques. There is a list of related documents and a reference list. Educational levels: High school, Middle school, Undergraduate lower division