What is the purpose of range gating in a tracking mode of a Radar?
Range gate gives to the direction tracking process the timing &quot;compare the monopulse beams now&quot;.
Servo tracking range gate can drift away if there's a strong artificial echo which is timed to give at first a plausible &quot;it's on the peak&quot; indication and slowly moved away.
Clever anti-jam systems and also an experienced radar operator can manually force the range gate follow the right target, no matter there's a strong fake echo.