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.
出处
《工程勘察》
CSCD
北大核心
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
