An estimation method for submunition dispersion uniformity based on kernel χ² test

It is one of important subjects to estimate uniformity of submunition dispersion points of fall. The current method using χ² test has two disadvantages, which are that estimated results are sensitive to sub area partition, and large sample capacity is required to obtain correct results. The former makes confidence of estimated results decrease, and the latter makes applied scope of the method restricted. A modified χ² test method called kernel χ² test based on kernel density estimation and χ² test was presented to improve these disadvantages. Submunition dispersion uniformity of a certain cluster warhead was estimated by the modified method and compared with the current method. The estimated results show that the modified method can overcome disadvantages of the current method, and describe submunition dispersion exactly.