测控中的近地轨道卫星SEL事件分析及操控  

SEL analysis and related operations in the TT&C for near Earth satellite

作　　者：李强 徐冰霖[1,2] 王大鹏 李会锋[2] 朱俊 张宝辉[2] 曹继宏[2] 王星宇 张国云 祝彦 习斌[2] 张闪 LI Qiang;XU Binglin;WANG Dapeng;LI Huifeng;ZHU Jun;ZHANG Baohui;CAO Jihong;WANG Xingyu;ZHANG Guoyun;ZHU Yan;XI Bin;ZHANG Shan(Key Laboratory of Spacecraft In-Orbit Fault Diagnosis and Maintenance;Xi’an Satellite Control Center: Xi’an 710043,China)

机构地区：[1]航天器在轨故障诊断与维修重点实验室 [2]西安卫星测控中心,西安710043

出　　处：《航天器环境工程》2019年第2期112-119,共8页Spacecraft Environment Engineering

基　　金：国家自然科学青年基金项目(编号:11503096)

摘　　要：针对空间辐射环境影响下近地卫星某器件单粒子锁定(SEL)事件频发现象,在分析卫星轨道根数演变的基础上,详细讨论SEL事件时空分布特征。结果表明,SEL事件的星下点分布具有明显地域特征,其在南大西洋区域、南北两极区域、其他区域的比例接近于3∶2∶1;器件SEL事件平均发生率略高于0.134 d^(-1),太阳活动较强时的发生率不足0.103 d-1,而太阳活动较弱时则接近0.165 d^(-1);近日点附近时的发生率达到0.200 d^(-1),远日点附近时约为0.072 d^(-1)。在测控中,针对SEL事件进行遥控作业自动识别与处理,操控时长平均为130 s。The single event latch-ups were frequently recorded in devices onboard a near Earth satellite.The temporal and spacial distributions of the SELs is investigated in this paper by analyzing the variation of the satellite's orbital elements including the semi major axis,the inclination,the local time of the descending node,and the solar incidence.Details of the space and time characteristics are discussed.For mitigating the SEL effects,an operation method in TT&C(Telemetry,Tracking and Command)is presented by programming a telecontrol schedule run in automation.It is shown that the SEL geographic location has a clear distribution with the proportion of 3:2:1 according to the South Atlantic Anomaly area,the two polar regions,and other places,respectively.The average SEL occurrence rate of the device SEL is above 0.134 d^-1 in the whole orbiting time.For a longer time span,when the sun is active,the rate is lower than 0.103 d^-1 in the solar maximum,and is about 0.165 d^-1 in the solar minimum.In an annual phase,the SEL occurrence rate reaches its peak value of 0.200 d^-1 in December when the Earth goes near the perigee and the sun has a greater influence;this rate drops to 0.072 d^-1 in July when the Earth moves close to the apogee and the sun has a smaller influence.The operation response to SELs in the TT&C relies on the automatic running of a cognitive telecontrol program with an average span of 130 s.

关 键 词：空间辐射环境 近地轨道卫星 单粒子锁定 测控 

分 类 号：V556.1[航空宇航科学与技术—人机与环境工程] V557