... the Soviet, the American researchers have perceived that the frequency sounds changed according to its movement and its distance. They concluded that a satellite could be a location tool. In 1959, "the Navy built the first satellite navigation system called TRANSIT and was intended to locate submarines"[Mar12]. In 1974, the US launched their first satellite GPS system "NAVSTAR" (Satellite Navigation for ... ...

• Word Count: 1289
• Approx Pages: 5
• Has Bibliography
• Grade Level: High School