Air Traffic Services of the SR are using communication, radio navigation and radar systems to control air traffic. Communication systems are operating at frequencies of 100-150 MHz. The output power of these systems is 5.0 to 20.0 W. The primary surveillance radar is operating at frequencies of 2-4 GHz. Transmitted power of these systems is 14-25 kW. The power of older types of radar is several hundred kW. Secondary radars operate at frequencies of 1030 MHz and 1090 MHz. Transmission power of a device is about 2 kW.
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