似单差法对起算数据的精度要求  

Accuracy Requirement of Similar Single-difference Method to Initial Data

作　　者：余学祥[1] 徐绍铨[2] 吕伟才[1] 

机构地区：[1]安徽理工大学资源与环境工程系,安徽淮南232001 [2]武汉大学测绘学院,湖北武汉430079

出　　处：《工程勘察》2003年第5期43-45,48,共4页Geotechnical Investigation & Surveying

基　　金：安徽理工大学博士基金资助

摘　　要：分析了首期观测提供的起算数据的误差对似单差法解算的GPS监测点变形量的影响规律。对于基准点精度 ,若监测距离在 10km以内 ,在取消SA政策后 ,利用单点定位结果即可满足要求。对于基线向量 ,从监测精度来看 ,需采用精密软件进行解算 ;从方法本身来看 ,要求其误差不超过10mm ,可采用商用软件进行解算。数值计算结果表明 ,采用似单差法进行GPS监测时 ,可以不考虑基准点是否存在变形。This paper analyzes the impact characteristics of the initial data given by the first period observation on the GPS monitoring point deformation solved by the similar single-difference method. For the base point accuracy, if the monitoring distance is within 10km, and the SA policy removed, the result of single-point positioning can meet the requirement. For the monitoring accuracy, the base line can be solved by precise software. Because of the method itself, required baseline error is less than 10mm, therefore, the commercial software can be used. The calculated result shows that the similar single-difference method can deal with GPS deformation monitoring despite the base point deformation or not.

关 键 词：似单差法 GPS监测 变形量 基准点误差 基线向量误差 

分 类 号：P228.4[天文地球—大地测量学与测量工程]