Dwell time (TD) in surveillance radar is the time that an antenna beam spends on a target. The dwell time of a 2D–search radar depends predominantly on the antenna's horizontal beam width θAZ, and the turn speed n of the antenna (in rotations per minute or rpm, i.e. 360 degrees in 60 seconds = multiplied by a factor of 6).
Dwell time is calculated by:
A block of constant PRF and coherently phased RF pulses, is referred to as a coherent dwell interval or coherent dwell time.P.E. Rademacher; B.H. Cantrell; G.C. Tavik, Clutter filtering and processing techniques for EMI detection and angle measurement in pulse Doppler radars, 2021,
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