Experiment study for simulation tracking of coarse pointing subsystem

It is known that the free-space optical communication is one of the most promising communications, and the ATP system especially coarse pointing subsystem is the key to construction and maintain of the communication link. To our knowledge, only few experimental experience for coarse pointing subsystem exists today especially with respect to communication construct in cities. Therefore, an experiment system for coarse tracking system simulation for free-space optical communication between buildings is set up. The control strategy adopted in the coarse pointing subsystem is described and some experiment with different simulation speed under constructed system has been done. The result shows that control accuracy is several hundreds of microradian and can meet the system requirement. Standard deviation for tracking error of X-axis increases with the increase of simulation speed, but has no order for Y-axis.