An extension of RM-330, The Circular Coverage Function. Although it is usually satisfactory to approximate the distribution of the point of impact of bombs, missiles, and other projectiles by a circular Gaussian (normal) distribution, there are cases in which the dispersions in distance and in azimuth are so unequal that approximation by means of an elliptical Gaussian distribution is a significant improvement. This memorandum evaluates the probability that a missile will land within a circle if it is aimed at the center and subjected to an elliptical Gaussian impact probability distribution. A table of the elliptic coverage function is provided and illustrated in graphical form.
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