• Source: Dwell time (radar)

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:





T

D


=



θ

A
Z



6
⋅
n






(in seconds)



{\displaystyle T_{D}={\frac {\theta _{AZ}}{6\cdot n}}\quad \quad {\text{(in seconds)}}}


A block of constant PRF and coherently phased RF pulses, is referred to as a coherent dwell interval or coherent dwell time.




References



This article incorporates text by Christian Wolff available under the CC BY-SA 3.0 license.

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