基于ITRF97的上海和鹿岛VLBI站地壳垂直形变的VLBI测定  

Determination of the Vertical Deformation Rate of Shanghai and Kashima VLBI Station Basing on the ITRF97

作　　者：杨志根[1,2] 朱文耀[1] SHUM C.K 舒逢春[1,2] 

机构地区：[1]中国科学院上海天文台 [2]中国科学院国家天文台 北京 100012 [3]Ohio State University

出　　处：《天文学报》2002年第2期205-211,共7页Acta Astronomica Sinica

基　　金：国家重点基础研究发展规划项目(G19980210703);上海市科学技术发展基金项目"亚太空间地球动力学研究"(JC14012);国家攀登项目(970231003)资助课题

摘　　要：利用美国宇航局(NASA)在1999年的VLBI全球解(glb1123)中关于上海VLBI站与国际上13个VLBI站的基线长变化率高精度测定结果,以及日本鹿岛Kashima和Kashima 34两VLBI站分别与国际VLBI站间的相应结果,基于最近的国际地球参考架ITRF97,估计得到了上海VLBI站和日本鹿岛两VLBI站相对于板块稳定区的地壳垂直形变率分别为-1.91±0.56 mm/yr、-3.72±0.74 mm/yr和-8.81±0.84mm/yr,表明上海VLBI站存在每年近2毫米的下降,讨论并证实日本鹿岛两VLBI站的地壳垂直形变速率是不一致的;基于不同板块运动模型的欧拉旋转矢量,估计得到了上述3站的水平形变速率;还估计给出了太平洋板块中部的形变率结果.Using the changing rates of baseline lengths between Shanghai and 13 international VLBI stations localed at 6 different tectonic plates determined during the past ten years, basing on the recent international terrestrial reference frame ITRF97, the vertical and horizontal deformation rate of Shanghai VLBI station relative to the stable area of the Eurasian tectonic plate are estimated as -1.91±0.56mm/yr and 11.07. ±0.59mm/yr with its local AZ 96°.3±3°.1; By using the same way as above, the vertical deformation rate of Kashima and Kashima34 VLBI station are obtained as -3.72±0.74mm/yr and -8.81±0.84mm/yr, respectively, which show that two VLBI stations localed at Kashima of Japan have the different vertical deformation rate and differ from the result -4.76±0.48mm/yr given by ITRF97 for this two stations. In addition, the horizontal deformation rates of the three VLBI stations above are estimated based on the different tectonic plate motion model; the deformation rate of the center part of the Pacific tectonic plate is also estimated.

关 键 词：天体测量学 VLBI基线测量 地球参考架 甚长基线干涉测量 地壳垂直形变 上海 VLBI站 

分 类 号：P227[天文地球—大地测量学与测量工程] P228.6[天文地球—测绘科学与技术]