what led to the development of the global positioning system
Global Positioning System
The GPS project was launched in the United States in 1973 to overcome the limitations of previous navigation systems , integrating ideas from several predecessors , including a number of classified engineering design studies from the 1960s . The U.S. Department of Defense developed the system , which originally used 24 satellites . It was initially developed for use by the United States military and became fully operational in 1995 . Civilian use was allowed from the 1980s . Roger L. Easton of the Naval Research Laboratory , Ivan A. Getting of The Aerospace Corporation , and Bradford Parkinson of the Applied Physics Laboratory are credited with inventing it . 
The GPS project was launched in the United States in 1973 to overcome the limitations of previous navigation systems , integrating ideas from several predecessors , including a number of classified engineering design studies from the 1960s . The U.S. Department of Defense developed the system , which originally used 24 satellites . It was initially developed for use by the United States military and became fully operational in 1995 . Civilian use was allowed from the 1980s . Roger L. Easton of the Naval Research Laboratory , Ivan A. Getting of The Aerospace Corporation , and Bradford Parkinson of the Applied Physics Laboratory are credited with inventing it .
The GPS project was launched in the United States in 1973 to overcome the limitations of previous navigation systems, integrating ideas from several predecessors, including a number of classified engineering design studies from the 1960s.  It was initially developed for use by the United States military.
The GPS project was launched in the United States in 1973 to overcome the limitations of previous navigation systems , integrating ideas from several predecessors , including a number of classified engineering design studies from the 1960s . It was initially developed for use by the United States military and became fully operational in 1995 .
It was originally developed for use by the United States military and became fully functional in 1995.
The GPS project was launched in the United States in 1973 to overcome the limitations of previous navigation systems , integrating ideas from several predecessors , including a number of classified engineering design studies from the 1960s . It was initially developed for use by the United States military and became fully operational in 1995 .