A GPS satellite is an artificial satellite utilised by the NAVSTAR GPS or Global Positioning System. The system’s first satellite, named NAVSTAR 1 was launched on 19th February 1978. The GPS satellite constellation (a group of man-made satellites working in tandem) is managed by the US Air Force’s 50th Space Wing. These satellites revolve around the earth at a height of about twenty thousand kilometres every day. They also finish two complete revolutions per day.