ITRF2005与CGCS2000坐标转换方法与精度分析  

TRANSFORMATION METHODS AND ACCURACY ANALYSIS BETWEEN ITRF2005 AND CGCS2000 COORDINATE

作　　者：林晓静[1] 张小红[1] 郭斐[1] 

机构地区：[1]武汉大学测绘学院,武汉430079

出　　处：《大地测量与地球动力学》2010年第2期117-119,124,共4页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(40874017);国家863计划项目(2006AA12Z325);创新研究群体科学基金(40721001);武汉市晨光计划(200850731375)

摘　　要：提出从框架和历元同时转换、框架和历元分开转换两种不同思路实现ITRF5到CGCS2000的坐标转换。转换结果表明：框架和历元同时转换的方法不能满足转换精度的要求；框架和历元分开转换，先根据若干基准点的位置与速度信息采用加权平均法内插转换点的速度实现历元间的转换，统一历元后再采用七参数法实现框架间的转换，其内符合精度与外符合精度均为1—2cm，能满足转换精度要求。With the adoption of China Geodetic Coordinate System 2000 （ CGCS2000）, it is becoming vital to transform the present measurement results to CGCS2000. Two different approaches are used to realize the transformation between ITRF2005 and CGCS2000. One is the transformation with considering the epoch and the frame together and the other is with considering the two aspects respectively. The practical results show that the former can not satisfy the accuracy required. As for the later, the motion rate of the points unknown can be interpolated first by using a weight-average method according to the available information of points known, and then adopt the 7 parameters to transform the different frames. This method can meet the needs of transformation accuracy which can achieve 1 -2 cm.

关 键 词：ITRF2005 CGCS2000 坐标转换 七参数 加权平均法 

分 类 号：P227[天文地球—大地测量学与测量工程]