The origins of dispersion error are analyzed ; effects of initial velocity dispersion , ballistic coefficient dispersion , drift coefficient dispersion , range wind & cross wind dispersion on the ballistic dispersion are discussed 分析了散布误差的起源，讨论了初速散布、射角散布、弹道系数散布、偏流散布、纵横风散布对密集度的影响。
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Then discusses its properties , such as biased property , relative efficiency of generalized variance and superiority comparisons between generalized ridge estimation and generalized least squares estimation . shows iterative algorithm based on the mean dispersion error 该估计虽然具有偏崎，但其估计精度具有良好的性质，如：有偏性、方差一致最优性、相对于广义最小二乘估计的广义方差效率、 mde ? ?有效性等。
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