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本文介绍了拼接卫星相机用的ＣＣＤ卫星器件时相对位置的测量方法及整个测量系统的工作原理，提出了一种有良好性能的焦距标度数学模型，分析了其实测的结果，并给出了焦距标度与被测件位置的关系曲线图。
This paper introduces the method of measuring the relative position of the CCD satellite device for stitching satellite camera and the working principle of the whole measuring system. A mathematical model of the focal length scale with good performance is presented. The measured results are also given. Focal length scale and the measured position of the relationship between the graph.