An Approach of Tropospheric Correction for VLBI Phase-Referencing using GPS Data
An Approach of Tropospheric Correction for VLBI Phase-Referencing using GPS Data
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DOI：
10.1088/1009-9271/8/1/14
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发表时间：
2008-02
期刊：
影响因子：
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通讯作者：
Bo Zhang;Xing-wu Zheng;Jinling Li;Ye Xu
中科院分区：
文献类型：
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作者：
Bo Zhang;Xing-wu Zheng;Jinling Li;Ye Xu
VLBI相位参考的主要误差来源是观测频率高于5 GHz的对流层。本文比较了由VLBI和GPS资料在VLBA站与GPS天线配置条件下得到的对流层天顶延迟。系统偏差和标准差均在亚厘米级。在此基础上，提出了一种利用VLBI和GPS数据进行对流层改正的新方法。
The dominant source of error in VLBI phase-referencing is the troposphere at observing frequencies above 5 GHz. We compare the tropospheric zenith delays derived from VLBI and GPS data at VLBA stations collocated with GPS antennas. The systematic biases and standard deviations both are at the level of sub-centimeter. Based on this agreement, we suggest a new method of tropospheric correction in phase-referencing using combined VLBI and GPS data.