The Global Positioning System Research for the Global Positioning Satellite (GPS) system began in the 1960s. At the time, the US and the USSR were competing with each other to launch man-made satellites, also developing a triangulation method for calculating positions on the surface of the earth using the wavelength of radio signals and the time taken for the signals to arrive.
全球定位系統小檔案全球定位系統的研究始於 1960 年代，當時美、蘇競相發射人造衛星，也發展出利用無線電波長與電波到達的時間，用三角定位法來計算位置的原理。