摘要
对在线精密单点定位技术进行测试,分析了它的动态、静态定位精度和收敛速度,以及多系统卫星观测对这两者的影响。结果表明,在线PPP静态定位单天解的精度在水平方向可达mm级,高程方向可达mm^cm级,可在10~20 min内收敛;静态数据模拟动态解算的精度水平方向为2~3 cm,高程方向为4~5 cm,而实际动态数据的解算精度略低于此精度。GPS/GLONASS组合系统能加快定位收敛速度,尤其在GPS系统观测条件较差的情况下,能够同时显著提高收敛速度和定位精度。
Online Precise Point Positioning technique is tested. And its dynamic and static positioning accuracy and convergence speed are specifically given out. And then, how multi-system satellite observations have effects on them is analyzed. The results show that static positioning accuracy of online PPP in a single day is up to millimeter level in the horizontal direction, millimeter-centimeter level in the elevation direction and the solution can converge within 10 to 20 minutes. The accuracy level of dynamic solution with the static data in the horizontal direction is 2-3 centimeters and 4-5 centimeters in the elevation direction respectively. But the accuracy of the solution of the actual dynamic data is slightly lower than that. The combined system of GPS and GLONASS usually accelerates the convergence speed, especially in the condition of poor observations of GPS which can simultaneously significantly improve the convergence speed and positioning accuracy.
出处
《测绘地理信息》
2014年第5期8-11,共4页
Journal of Geomatics
基金
国家自然科学基金资助项目(618210700037)
