摘要
本文结合实际工程项目,采用DGPS和PPP两种方法分别对不同区域三个架次的轨迹进行解算并对比分析轨迹差异,结果显示两种方法解算的轨迹存在系统偏差：平面（NE）方向小于10cm,高程（H）方向PPP解算结果要大于DGPS结果,差值约15~40cm。这种系统偏差呈周期性振荡,在NE方向尤为明显,可能是由GPS信号失锁引起整周突变造成的。姿态角Roll、Pitch均优于Heading方向。
Observations collected from three sorties in different areas are processed to obtain the trajectories by using DGPS and PPP respectively. The analysis of the comparison between the two different trajectories acquired indicates that there is a systematic deviation which is less than 10 cm in north/east direction and about 15 ~ 40 cm in height direction. The periodic systematic deviation appears more obvious in horizontal direction than in vertical direction,which probably because of the cycle slip caused by loss of GPS signal. As for attitude angle,accuracy is better both in Roll and Pitch direction than in Heading direction.
出处
《工程勘察》
2016年第6期67-70,共4页
Geotechnical Investigation & Surveying
