Microwave and Laser Radar
Typical Timing
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Microwave and laser traffic radar minimum time (integration or sample period or time) to track a target varies with model from about a quarter of a second (250 milliseconds = 250 ms) to a half of a second (500 ms) or more.

250 ms = 1/4 sec = 4 samples / sec
333 ms = 1/3 sec = 3 samples / sec
500 ms = 1/2 sec = 2 samples / sec

Try clapping at the rate of 3 or 4 times per second to see how fast 3 or 4 samples per second really is, and how little time one has to react to such a short duration signal. In many cases a radar or ladar may require more than 1 sample period to establish a target's speed.

Police Traffic Radar Handbook

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