Design of the CCD angle detection algorithm in periscope intersatellite optical communication terminal

In the equipment of periscope of intersatellite optical communication terminal, there are some reflecting mirrors errors and axes errors, and they seriously affect the CCD angle detection precision. In order to keep laser-track and optical communication stable, the optical communication terminal must have great precision of setting, so develop of terminal is costly and venture. Firstly, this paper classifies and defines these setting errors of rotational platform; secondly, it sets the model of the CCD angle detection in the intersatellite optical communication terminal ; and then, it analyses every infection of setting errors of the periscope; finally, it puts forward a new CCD angle detection algorithm to compensate the infection of setting errors of the periscope. Comparing with the CCD angle detection algorithm without compensate, the new one improves precision of CCD angle detection greatly without high precision of setting.