Dwell time (''T_D'') in surveillance

radar Radar is a detection system that uses radio waves to determine the distance (''ranging''), angle, and radial velocity of objects relative to the site. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, w ...

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 ''θ_AZ'', 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 = \frac \quad\quad \text

References

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