VLBI相位校正信号提取的软件实现方法  

SOFTWARE REALIZATION METHOD OF EXTRACTING VLBI PHASE CALIBRATION SIGNAL

作　　者：杨艳[1] 郑为民[1] 

机构地区：[1]中国科学院上海天文台

出　　处：《中国科学院上海天文台年刊》2006年第1期107-117,共11页Annals Shanghai Astronomical Observatory Chinese Academy of Sciences

基　　金：国家自然科学基金(No.10403009)绕月探测工程项目资助课题。

摘　　要：从VLBI相关处理结果中提取的延迟值包括了天线、终端等设备的时延,必须对其加以修正,最终结果才能达到精度要求。提取相位校正信号,可以消除这些设备引入的时延,从而校正同一波前信号到达基线两端的几何时延。该文介绍了提取相位校正信号的原理、算法及软件实现方法。软件采用多线程和SSE技术,具备4台站多通道全部相位校正信号提取能力。It is an important part of VLBI correlation processing to detect the phase calibration （PCAL） signal, which can be used to eliminate system delay errors caused by instrument. Firstly the basic principle and algorithm of PCAL signal detection is studied, and then some methods of parallel computation for algorithm optimization are discussed. Finally, the software realization method is described. A software has been developed to extract 4-station, multi-channel PCAL signals and it will be applied to the ongoing Chinese lunar exploration project.

关 键 词：甚长基线干涉测量 相位校正信号 并行计算 软件相关处理机 

分 类 号：P228.6[天文地球—大地测量学与测量工程] TP31[天文地球—测绘科学与技术]