To improve the remote antimissile capability of medium caliber gun (MCG), an antimissile project was put forward by leading launching one-dimensional damping trajectory-correction-projectile (TCP) according to the ballistic characteristics and flight principle. The projectile-target encounter time errors were introduced to antimissile errors and hitting models of MCG. The flight time errors of projectile were gained and corrected by using simulation statistic method. Kill probabilities of TCP and uncorrected projectile against cruise guided missile were simulated in a long range. The resluts show that it can greatly improve antimissile capability of MCG in a long range by increasing damping in terminal trajectory to correct encounter time errors of projectile-target. The results offer reference for antimissile operational use of MCG.%为了提高中口径火炮远距离反导能力,针对一维阻尼环机构弹道修正弹的弹道特性和飞行原理,提出提前发射修正弹用于反导的设想,将弹目交汇时间误差融入到中口径火炮对空误差及命中毁伤模型中,采用仿真统计法,获取并修正每发射弹的飞行时间误差,仿真计算得出修正弹与无控弹远距离对巡航导弹的毁伤概率.结果表明：弹道末端通过增阻减速修正弹目交汇时间误差能够大幅提升中口径火炮的远距离反导能力,研究结果为中口径火炮的反导作战使用提供了参考.
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