Circular error probable (CEP), also circular error probability or circle of equal probability, is a measure of a weapon system's precision in the military science of ballistics. It is defined as the radius of a circle, centered on the aimpoint, that is expected to enclose the landing points of 50% of the rounds; said otherwise, it is the median error radius, which is a 50% confidence interval.
Circular error probable (CEP), also circular error probability or circle of equal probability, is a measure of a weapon system's precision in the military science of ballistics. It is defined as the radius of a circle, centered on the aimpoint, that is expected to enclose the landing points of 50% of the rounds; said otherwise, it is the median error radius, which is a 50% confidence interval.
Source: Wikipedia "Circular error probable" · CC BY-SA 4.0
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