【摘要】 甚长基线干涉测量(VLBI)综合孔径望远镜具有极高的空间分辨率,被广泛应用于深空探测器高精度测量。软件相关处理技术作为新的VLBI信号处理技术在国际上日益受到重视,已成功应用于深空目标跟踪测量。近年来,上海天文台在国内率先开展了有关研究,建立了具备快速条纹搜索、相位校正信号提取功能的深空跟踪VLBI软件处理机系统,并在我国首次月球探测工程和中国VLBI网对欧洲绕月探测卫星SMART-1定轨等重要观测中成功应用。本文介绍了探月工程用软件处理机结构。研究表明,VLBI软件相关处理技术具有结构灵活、使用便捷、可靠性高、扩展方便、易适应新算法等特点,特别适用于深空探测器跟踪测量。更多还原

【Abstract】 VLBI(Very Long Baseline Interferomerty) is a kind of technology with very high space angular resolution,and it is widely used in the precise deep space explorer tracking.The software correlator,a novel and key VLBI data process technique,has received more and more recognition and become practical in the deep space tracking.The domestic research group also began studies on the software correlator lately and got fruitful results.A software correlator system specialized in the deep space tracking was successfully developed.With the functions of fast fringe search and phase calibration abstraction,this correlator was used in the first European circumlunar explorer joint trace experiment performed by the Chinese VLBI network.It has been applied in the Chinese lunar exploration project.With the characteristic of flexible structure,scalability,new algorithm fusion ability,the software correlator is especially suitable for deep space TT&C.In fact,along with the dramatic development of computer the VLBI software correlator will take greater effect in the deep space exploration.更多还原