Sputnik 1 Satellite-1 Radio Signal

Radio signal of the first earth satellite Sputnik 1 (USSR) The radio transmitter “Sputnik-1“ (radio station D-200) radiated radio waves at two frequencies: 20,005 and 40,002 MHz, alternately (the sending of the signal by one transmitter corresponded to the pause of the other, the switching was performed by an electromechanical relay with a period of several tenths of a second).