并置VLBI站相对形变率及其与VTRF2005结果的比较(英文)  

RELATIVE DEFORMATION RATES BETWEEN CO-LOCATED VLBI STATIONS AND ITS COMPARISONS WITH VTRF2005

作　　者：杨志根[1] 舒逢春[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26-32,共7页Annals Shanghai Astronomical Observatory Chinese Academy of Sciences

摘　　要：对杨志根等人在2005年估计的全球6个并置VLBI站的相对形变率(特别是相对垂直形变率)结果与最近的VLBI全球解VTRF2005的相应结果作了比较。结果表明,北美Greenbank的NRAO20和NRAO85_3两个VLBI站之间每年3—4mm的相对垂直形变率和Westford的WEST- FORD和HAYSTACK两个VLBI站间每年1-2mm的相应结果可以进一步得到肯定;太平洋夏威夷岛的KOKEE和KAUAI两个VLBI站每年2～5mm的相对水平形变率和日本鹿岛的KASHIMA和KASHIM34两个VLBI站间每年1-2mm的相应结果也可以得到确认。然而,每年2—4mm的KASHIMA和KASHIM34站间的相对垂直形变率结果,在过去所有观测研究的结果中都被基本肯定,在VTRF2005中的结果中却几乎消失了,对其中可能的原因作了讨论。此外,对北美的FD-VL- BA和HRASO85两个VLBI站间的相对垂直形变率仍不能肯定,在不同的全球解中,FD-VLBA站的形变率解结果是基本稳定的,而HRASO85站在VTRF2005中的垂直形变率结果为(2．61±3．91) mm／a,与估计的结果符号相反,并且比在VTRF2003中的相应结果大了2．2mm／a,估计误差也大了近7倍。有关的结果还有待采用更新的资料进行讨论。The data of the relative deformation rates between stations in six co-located VLBI sites were used to compare with corresponding results obtained from solutions of the recent VLBI Terrestrial Reference Frame 2005 （VTRF2005）. Comparisons led to the conclusions that the relative vertical deformation rates of 3 - 4 mm/a between NRAO20 and NRAO85_3 stations and of 1 - 2 mm/a between HAYSTACK and WESTFORD stations are re-confirmed. The relative horizontal deformation rates of 2 - 5mm./a between KOKEE and KAUAI stations as well as that of 1 - 2 mm./a between KASHIMA and KASHIM34 stations are basically confirmed. However, a relative vertical deformation of about 2 - 4 mm/a between the KASHIMA and KASHIM34 stations, which has been confirmed in the previous studies, disappears in the VTRF2005. Some discussions are addressed.

关 键 词：地球参考架 并置VLBI站的相对形变率 VTRF2005 

分 类 号：P228.6[天文地球—大地测量学与测量工程] P312.2[天文地球—测绘科学与技术]