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A new method of calibrating the spatial coordinate coherence of shadowgraph-taking camera stations at the long distance with PSD

The main method of the attitude measurement is to get series of graphs for analyzing the changing attitude of the projectile by utilizing multiple shadowgraph-taking camera stations.However,the premise of accurate results is that feature points on graphs must match its spatial coordinate in a certain spatial coordinate.Addressing to this problem,combining the optical lever principle and the PSD,we propose a method of calibrating the spatial coordinate coherence of the long distance and multiple shadowgraph-taking camera stations,and analyze the measurement accuracy and repeatability of this method.According to the results,the accuracy of this calibration method is superior to 0.1mm .