A pulse Doppler radar uses eight PRFs in MPRF operation mode (declare a target based on seeing the target in at least 3 out of the 8 PRFs as a decision criterion). It has 64 points FFT for frequency domain processing and having 12 pulse period buffer before FFT, the antenna beam width is 3º, the scanning speed is 60º/s.
Calculate the lower limit of the average value of the eight PRFs (in order to assure declaring targets whitin a dwell time at least one time).