固定转换参数的GPS网平差与坐标转换模型  

Fixed Transformation Parameter's Adjustment and Coordinate Transformation Model of GPS Net

作　　者：沈云中[1] 傅晓明[2] 

机构地区：[1]同济大学国土信息与测量工程系,上海200092 [2]上海测绘院,上海200063

出　　处：《同济大学学报（自然科学版）》2004年第5期652-655,共4页Journal of Tongji University:Natural Science

摘　　要：分析了起始数据误差与坐标轴指向变化对于转换参数的影响 ,提出了采用固定转换参数的GPS基线向量与地面已知数据进行联合平差与转换的模型 ,探讨了采用该模型计算时应该注意的问题 .利用这一模型处理了上海地铁M8线GPS控制网的数据 ,结果表明 :当已知点位于GPS网的一侧时 ,采用这一模型能够显著地提高GPS控制网的外符合精度 .This paper first analyzes the influence of datum data error and orientation of coordinate axes on the transformation parameters,then puts forward the fixed transformation parameter's adjustment and coordinate transformation model of GPS net combined with local known data.Some key points in the use of the model are also discussed.The model pointed out in this paper is used to process Shanghai M8 GPS control net.The results show that the model in this paper can significantly improve the accuracy of calculated coordinates,when the known points lie on one side of the GPS net.

关 键 词：GPS控制网 平差计算 坐标转换 

分 类 号：P228.4[天文地球—大地测量学与测量工程]