简要地叙述了利用三线阵ＣＣＤ影像生成用于光束法空中三角的等效框幅像点坐标的方法，并构成所谓“等效框幅像片（ＥＦＰ）”。从卫星摄影测量特点出发，光束法平差的数学模型除了经典的线性化共线方程外，还引用了外方位元素连续（平滑）条件。以数字模拟的方法给出了几种不同情况下光束法航线平差的结果，进而对中分辨率（１０ｍ）卫星三线阵ＣＣＤ影像测制等高距为２０ｍ的地形图问题作了简要分析。 A brief description of the method of generating equivalent frame image point coordinates for the airborne triangulation using a three-line array CCD image is made, and the so-called “equivalent frame image (EFP)” is constructed. Based on the features of satellite photogrammetry, the mathematic model of beam adjustment is a reference to the continuous (smoothing) condition of the extrinsic elements in addition to the classical linear collinearity equation. The numerical results of several different cases of beam alignment error are given by numerical simulation. Then, the topographic map problem of 20 m topography with mid-resolution (10m) satellite three-line CCD imaging is analyzed briefly.