激光星间链路快速捕获技术综述

Review on Fast Acquisition Techniques of Laser Inter-satellite Links

介绍了激光星间链路终端的指向误差建模、终端指向误差在轨标定、激光星间链路扫描捕获参数优化及链路中断恢复重捕获4个方面的国内外发展现状,指出了须重点研究的几个方向,包括涵盖全面误差要素的非线性指向误差模型的建立、在轨观测数据获取方法的改进、激励轨迹的优化设计与参数估计方法的合理选取以及针对链路中断恢复重捕获方法研究,最后结合全球导航星座的特点提出适应导航星座的激光链路快速捕获技术研究建议。

The development of fast acquisition techniques of laser inter-satellite links in four aspects respectively are reviewed in the paper,including:analysis and modeling of pointing error of laser inter-satellite link terminal,in-orbit pointing error calibration,parameter optimization in the scanning acquisition process and re-acquisition methods in the recovery process from link loss.The research directions are pointed out,including the structuration of a nonlinear pointing error model comprised of comprehensive error factors,enhancement on in-orbit data acquisition methods,optimization of excitation trajectories,selection of parameter estimation methods and development of re-acquisition algorithms under long-duration link loss.Finally,several research advices are proposed on acquisition techniques of laser inter-satellite links of navigation constellation accommodating with their characteristics.