The present document specifies technical characteristics and methods of measurements for ground based monostatic ATC primary surveillance radars with the following characteristics: - operating in the 2 700 MHz to 3 100 MHz frequency range; - transmitter output peak power up to 100 kW; - the transceiver-antenna connection uses a hollow metallic rectangular waveguide of type WR284/WG10/R32 according to IEC 60153-2 [i.6] with a minimum length between the output of the power amplifier and the input to the antenna of 2,886 m (20 times the wavelength of the waveguide cut-off frequency); - the antenna rotates, is waveguide-based and passive; - the transceiver output uses a RF circulator.