12 January 2018 An integration time adaptive control method for atmospheric composition detection of occultation
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Abstract
When sun is used as the light source for atmospheric composition detection, it is necessary to image sun for accurate identification and stable tracking. In the course of 180 second of the occultation, the magnitude of sun light intensity through the atmosphere changes greatly. It is nearly 1100 times illumination change between the maximum atmospheric and the minimum atmospheric. And the process of light change is so severe that 2.9 times per second of light change can be reached. Therefore, it is difficult to control the integration time of sun image camera. In this paper, a novel adaptive integration time control method for occultation is presented. In this method, with the distribution of gray value in the image as the reference variable, and the concepts of speed integral PID control, the integration time adaptive control problem of high frequency imaging. The large dynamic range integration time automatic control in the occultation can be achieved.
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Lin Ding, Lin Ding, Shuai Hou, Shuai Hou, Fei Yu, Fei Yu, Cheng Liu, Cheng Liu, Chao Li, Chao Li, Lin Zhe, Lin Zhe, } "An integration time adaptive control method for atmospheric composition detection of occultation", Proc. SPIE 10620, 2017 International Conference on Optical Instruments and Technology: Optoelectronic Imaging/Spectroscopy and Signal Processing Technology, 106200I (12 January 2018); doi: 10.1117/12.2284918; https://doi.org/10.1117/12.2284918
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