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弹着点(point of impact,简称POI),是指抛射物在外弹道飞行末端撞击到物体时的位置。 (PS:此处的抛射物范围较宽泛,包括并不限于子弹、炮弹、航空炸弹、火箭弹和导弹的弹头等一切现代远程武器的投射物[1]。)
短时间内连续射击的弹着点之集合称为弹着组(grouping),其各个弹着点相互分布的总尺寸代表了发射装置的精度(precision);而整个弹着组与瞄准点(point of aim)的偏差平均值则代表了发射装置的准确度(accuracy)。
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