空间环境对卫星光通信系统性能的影响分析

分析了空间环境对卫星光通信系统的主要影响因素,包括高能带电粒子辐射、太阳辐射、等离子体辐射等环境。分析结果表明,为了有效减小卫星光通信器件的单粒子翻转率,需要对轨道倾角和轨道高度进行优化设计;为了有效抑制太阳辐射,对日俯仰角需要限制在一个很小的变化范围;增大信号发射功率和减小系统跟瞄误差都是提高卫星光通信系统可靠性的有效途径;对等离子体辐射环境来说,300eV以上的中等能量等离子体会严重干扰卫星的正常工作。

Analysis of space environmental effects on the performance of satellite optical communication system

The major factors of space environment affecting satellite optical communication system are analyzed,including high energy charged particles radiation,solar radiation,space plasma radiation etc.To effectively decrease the single event upset rate of satellite optical communication equipment,the orbit altitude and inclination of satellite need to be optimized.To effectively restrict the solar radiation,the elevation angle toward sun needs to be limited to a small scope,and the increase of transmitted power and decrease of tracking error are both the effective ways to increase the system reliability.For space plasma radiation 300eV high energy plasma could greatly interfere the normal function of satellite.