| 摘要 |
PURPOSE:To improve the accuracy of attitude control by arranging plural linear light receiving parts across the scanning direction of a star image formed by an optical system, and making the linear light receiving parts wide in width on the side where scanning speed is fast and narrow on the side where the scanning speed is slow and making the width of detection pulses constant. CONSTITUTION:The slit A1 of a light shielding plate 12 arranged crossing the scanning direction of the star image formed by the optical system 11 is formed in such a trapezoid shape which the width is wide on the side of the moving speed of the star image is fast and narrow on the side where the speed is slow. Then the width of a pulse sent out of a photoelectron amplifier tube 13 as to a star having an optional elevation angle is made constant and the pulse is sent to a signal processing circuit 14, which measures the generation time of the pulse. Thus, the accuracy of the detection time of the start is made constant and the start is securely identified; and the attitude of a space flying object in spin motion is controlled with high accuracy.
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