History of GPS get along as numerous advanced things of the past from military specifically from US NAVY and at present comprises of 24 satellite configuration. With the debut of the first satellite by USSR in the 60′s US naval forces began to process early version of the navigation system designed to transcend all known navigational methods known at a time.
Because a result of intense work two early systems were acquired. Among them was called Transit, the designer of the system names Richard Krischner. In his final design system consisted of 7 satellites and primary signal for the system was radio receiver signal. He begin this work in early 1964. GPS global positioning system became fully available for civilian use in the mid 80′s.
The second GPS system was designed and engineered in 1967 and was called Timation. The main improvement over Transit was in the implementation of the atomic clock that gave much better accuracy.
With more money spent and more demanding requirements NAVY and US Air force decided to combine their efforts in GPS field and created the organization what is now known as NAVSTAR. System’s first 4 satellites were launched in 1978 and have recently been running on 24 satellites orbiting the earth. This quantity allows beaming to earth continuously GPS signals that are available throughout the year uninterrupted unlike earlier version of the same system when devices had to wait until signal could have been reacquired.
As anything that has military roots, GPS finally moved into private sectors. However, US Government would not release full capability of the system to the general public and provide signal that is accurate only up to 100 meters versus 10 meters that military uses it. There is specific signal introduced that creates this noise and distorting accuracy of the signal.