视准轴是十字丝中央交点与物镜光心的连线。
基于灭点理论，提出一种利用像底点检校机载POS系统视准轴误差的方法。
According to the theory of vanishing point, a novel approach to calibrate the boresight misalignment of airborne position and orientation system (pos) based on photo nadir point is proposed.
本文引进“视准线”的新概念以补充“机准轴”概念的不足。
This paper introduces a new conception of collimation line to make up for the inadequacy of the notion of collimation axis.
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