Satellite Laser Links Pointing Accuracy Analysis Methods

Due to the small scattering angle of the laser beam at the transmitting end and the small captured field of view at the receiving end of the laser inter-satellite equipment, the pointing accuracy of the laser inter-satellite is the key to the successful laser link building. The uncertain area of the laser capture field of view is closely related to the laser pointing error. It is necessary to analyze the various factors that cause the laser pointing error in the satellite system and their effects on the acquisition and tracking. In this paper, the error sources affecting the laser pointing accuracy are analyzed firstly, including the error of laser terminal equipment itself, the error of satellite attitude control, the error of satellite structure installation, the error of time and the error of orbit ephemeris. Then, the satellite three-axis error comprehensive calculation method is used to model all kinds of errors, and the comprehensive evaluation of the influence of errors on pointing accuracy is given, which solves the problem of accurate evaluation of uncertain area of field of view captured by inter-satellite laser link. Finally, based on the simulation study, the adaptability analysis of the satellite-based realization of the laser inter-satellite link is carried out, which provides the design basis for the engineering realizability.