Highly precise ground certification system of satellite laser communication

To realize the high-accuracy evaluation of adaptive capacity of laser communication terminal to satellite platform disturbance and orbit attitude changes on the ground, the satellite disturbance simulation technique and satellite following analogue simulation technique were researched, from which the ground verification scheme for laser communication system was proposed. Firstly, the effect of laser communication link following detection error on system following performance, as well as the feature of satellite disturbance vibration source was analyzed. Then the model of the vibration source was constructed. The key technology on satellite disturbance simulation and following simulation and countermeasure were analyzed. Finally, combining with current satellite laser communication and satellite platform technology level, the disturbance and following simulation was developed and the laser communication system test was finished via typical data. Experimental result verifies that high-accuracy beam pointing control based on double feedback loop can improve the control accuracy of beam pointing of satellite disturbance simulator greatly, and the beam control accuracy is superior to 0.1″. With the high-frequency and low-frequency joint satellite disturbance simulation method, the high-accuracy beam control of which control bandwidth superior to 1 kHz is realized. Moreover, the detection accuracy of high-accuracy following system to following performance of satellite photo-communication terminal within satellite operating range reaches to 0.1″.