Circular Dispersion

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Circular Dispersion

In rocketry, the diameter of a circle within which 75 percent of the events under study occur. CD = 3.330Missing Image:IMG src="c_files/sigmasm.gif" where Missing Image:IMG src="c_files/sigmasm.gif" = standard deviation.
Circular dispersion is most often used as a measure of error of the accuracy with which rockets reach their intended target.

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use