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炮弹、火箭、导弹、航天飞行器等高速飞行体或其模型的自由飞行测量，都是利用弹道靶道完成的，弹道靶道测量技术中的重要内容之一，是空间坐标系的建立与高速飞行体空间坐标的计算。文中介绍了我国自行研制的第一条中间弹道靶道空间坐标系的建立与高速飞行体空间坐标的计算方法，并给出了计算公式。经实际使用表明，ＩＢ－１２中间弹道靶道空间坐标系建立的方法正确，测量精度高，为我国靶道测量技术提供了有益的经验。
Free-flight measurements of high-speed flying objects such as shells, rockets, missiles and space vehicles, or their free-flying measurements, are all accomplished by using trajectory trajectories. One of the important aspects of trajectory trajectory measurement techniques is the establishment of space coordinate systems and high-speed flight Calculation of body space coordinates. In this paper, the establishment of the first space trajectory coordinate system and the method of calculating the space coordinates of high-speed flight trajectory are introduced. The practical application shows that the IB-12 intermediate ballistic trajectory space coordinate system is established correctly and the measurement accuracy is high, which provides a useful experience for the measurement technology of the target track in our country.