Category Archives: Navigation System

The Global Positioning System

The Global Positioning System (GPS) is a satellite-based navigation system that was developed by the U.S. Department of Defence in the early 1970s as the next generation replacement to the Transit system*. It consists of a constellation of 24 operational satellites with subgroups of 4 satellites operating in each of six different orbit planes, and three segments, space, control and user. The U.S. Air Force develops, maintains, and operates the space and control segments.

View the full report (pdf 16 pages): The Global Positioning System