中文摘要：

根据毫秒脉冲星计时测量和深空导航应用的基本原理,分析了对脉冲星位置、自行和视差等天体测量参数的VLBI测量精度需求,讨论了我国VLBI网的现有观测能力和不足及可能的改进途径,包括天线后端配置、时钟同步和数据互相关处理等。

英文摘要：

The requirement of observation precision of pulsar astrometric ding the position, proper motion and parallax by VLBI technique is anal parameters inclu- yzed based on the fundamental principle of pulse timing observations and the application in deep space naviga- tion of millisecond pulsars. It is also discussed concerning the current technical specifica- tions, the deficiencies as well as the possible ways of improvement in the equipment of elec- tronic backend of antennas, the data cross-correlation processing and the time synchroniza- tion of the Chinese VLBI network on the observation of millisecond pulsars for criticism and reference.