Measurements of the VLBI experiments during the first campaign of the Asian-Pacific space geodynamics (APSG) program

作     者：王广利 李金岭 张晋 刘祥 叶叔华 钱志瀚 AOKIKazuo ISHI-HARAMisao RICHStrand CLYDECox MAChopo RYANJim 

作者机构：1. Shanghai Astronomical Observatoly Chinese Academy of Sciences 200030 Shanghai China 2. Goddard Space Flight Center 20740 Greenbelt MD USA 3. Urumqi Astronomical Observatory Chinese Academy of Sciences 830011 Urumqi China 4. Geographical Survey Institute Japan 5. GilcreekVLBl Station NASA USA 6. Kokee VLBl Station USNO USA 

出 版 物：《Science China Mathematics》 (中国科学：数学（英文版）)

年 卷 期：2001年第44卷第2期

页      面：259-264页

核心收录：

学科分类：070904[理学-构造地质学] 0709[理学-地质学] 07[理学] 

主　　题：APSG VLBI crustal motion measurements 

摘      要：During the first campaign of the Asian-Pacific space geodynamics (APSG) program in October 1997, two VLBl experiments were successfully organized and coordinated by the Astrometry and Geodesy VLBl Group of Shanghai Astronomical Observatory, the Chinese Academy of Sciences, cooperated with geodetic VLBl group, GSFC, NASA, USA. Six VLBl stations participated in the experiments, including Seshan and Urumqi station of China, Gilcreek station in Alaska and Kokee station in Hawaii of USA, Kashima station of Japan and Hobart station at Tasmania of Australia. Baseline lengths are from 1 900 to 11 000 km and the mean relative uncertainty of the baseline length measurements is 1.0 x 10-9. In addition, the rates of the baseline lengths among the six stations and their three-dimensional velocities are solved out via global analysis of the two APSG sessions and the historical observations of the six stations as well as other VLBl observations from the global observation network. These results are appreciable to the studies of the modern crustal movement in the Asian-Pacific region. Especially,an 8 mm/a eastward motion and a 14 mm/a north by northeast motion are detected respectively for Seshan and Urumqi stations relative to the stable part of the Eurasian plate. The motions directly illustrate the effect of the northward movement of Indian plate on the modern crustal motions of the northwestern and the eastern part of China, which is of important significance to the study of the modern crustal motion of China.