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中文摘要：
介绍了2008年中国科学院上海天文台佘山25 m VLBI射电天线的归心测量方案、观测及资料处理情况。此次测量在资料解析方法上提出了改进,通过坐标系变换,把三维拟合问题转换为二维平面问题,有效控制了观测噪声的影响,确保了参数解的精度和稳定性。
英文摘要：
In order to develop and improve the strategies of observation and data analysis,to develop software system and to check the precision of parameters,we introduce the site survey at the Sheshan 25 m radio telescope of Shanghai Astronomical Observatory in 2008.This survey is a part of the whole effort to determine the local tie parameters among the stations of VLBI,SLR and GPS at Sheshan.And such parameters are important to the compilation of terrestrial reference frame based on various space geodetic techniques.In this survey there are new tries in several aspects,especially the frame transformation is adopted in the data analysis so as to simplify three-dimensional fitting into planar reduction,which sustains the stability and precision of parameter solutions.The parameter precision is on the millimeter level and which shows the rationality and validity of the strategy and implementation of this survey.
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