摘要
后续深空探测任务要求微波测量精度提高至少一个数量级。在此背景下,首先分析了目前我国深空测控系统无线电测距、测速现状,给出了主要误差源分解以及精度提升具体措施。针对行星间等离子体附加的测量误差,提出了多频链路消除行星间等离子体的具体方案。理论推导表明多频链路的设计使得无线电观测量基本上不受角距的影响。针对目前米级的设备校零残差提出了设备零值在线校正技术,以满足分米测距精度要求。
To fulfill the future deep space exploration mission,the radio measurement accuracy must be en-hanced at least one order. The current situation of ranging and velocity measurement of China＇s deep space tracking,telemetry and command（TT＆ C） system is analyzed,and analysis of main error budget and accruacy improvement suggestions are provided. For the attached measurement error of interplanetary plasma,a multi-frequency link scheme is proposed to isolate the interplanetary plasma. The theoretic analysis shows that the multi-frequency link scheme makes the measurement effective under any Sun-Earth probe angle. The station delay bias online monitoring is presented to reduce the station residual error from meters to decimeters.
出处
《电讯技术》
北大核心
2017年第1期22-26,共5页
Telecommunication Engineering
基金
中国电子科技集团公司主导类创新基金
关键词
深空探测
测控系统
高精度测量
多频链路
在线监测
deep space exploration
TT＆C system
high-accuracy measurement
multi-frequency link
on-line monitoring
