Prospective study of high geodetic resolution to future VGOS reference point determination

作者：Zhibin Zhang,Guangli Wang,Dezhen Xu,Shize Song

摘要：The fast slewing rate and wide band of the VLBI2010 Global Observing System(VGOS) telescopes are beneficial to procure more observations and to obtain VLBI reference points(RPs) of high precisions.Meanwhile, with the development of synchronous tracking of fixed targets on telescopes during the observing, the RPs also can be determined in near real time based on a frame defined by other techniques. These opportunities provide us a possibility to explore the high geodetic resolution of VGOS telescopes. We design a thermal variation in RP as true values, and schedule a synchronous session of VGOS and target point(TP) series observing. Then VGOS delays and TP series are simulated and solved via piecewise functions. The results show that the accuracy of vertical component of the RP could be determined at an accuracy of 0.5 ± 0.3 mm in an hour using TP series, whereas the vertical components of RP solved by using VGOS delay measurements have a greater uncertainty due to the random error in the simulated atmosphere and bad radio source sky coverage in a shorter time interval. Some details in the data processing and accuracy evaluation are also introduced.

发文机构：Shanghai Astronomicai observatory University of Chinese Academy of Sciences Beijing Institute of Tracking and Telecontrnunications Technology

关键词：REFERENCEPOINTVGOSGEODETICRESOLUTIONReweightingIndirectmethod

分类号： P22[天文地球—大地测量学与测量工程][天文地球—测绘科学与技术]