A radar processor for controlling detonation of a munition and operable to
receive a detonation altitude from an external source is provided. The
radar processor is configured to set a first range gate and a reference
range gate based on the received detonation altitude, and cause a radar
transmitter to operate in a continuous wave mode, for a predetermined
period, upon receipt of radar return signals through the first range
gate. The radar processor calculates a velocity of the munition from
continuous wave return signals, and calculates a time delay for
outputting a detonation signal based on the received detonation altitude,
the calculated velocity, and a reference altitude of the munition, the
altitude of the munition calculated based upon receipt of radar return
signals through the reference range gate. The radar transmitter operates
in a pulse mode while the munition is outside the reference range gate.