实时VLBI技术

The Real-time VLBI Technology

随着通信技术的发展出现了用数据通讯网络代替磁带记录与传输 ,将数据直接传至数据中心处理的实时VLBI技术 ,它包括准实时和真实时VLBI两个技术层次 ,是VLBI技术的一次飞跃。实时VLBI除具备传统VLBI的高精度、高灵敏度和全天候、全天时被动观测能力以外 ,还具有设备简化、自动化程度高、实时性、易于利用现代通信技术获得宽带能力与高灵敏度等突出特点。它在VLBI台站检测、航天器精密跟踪、UT1加强观测和传统的测地和天文学观测领域均有重要的科学意义和实用价值。

With the development of communication technology the data network comes replacing the traditional tape recording and transmission.The real-time VLBI technology directly transmitting data to the processing center consists of two technical levels,quasi-real-time and true real-time.This is a leap in the development of VLBI technology.The real-time VLBI,besides the high accuracy,sensitivity and all-weather and full-time passive observation in the traditional VLBI,has the characteristics of simple equipment,high automatic,real time and easy to obtain wide-band ability and high sensitivity with the help of modern communication technology.The real-time VLBI is of importance to the scientific and application fields of VLBI station detection,precise space vehicle tracking,intensive UT1 campaign,conventional geodetic and astronomical observation.