摘要
针对IGS最终精密有约12—18 d的时延,不利于C、D级GNSS工程控制网的实时解算,本文以实际工程为例,尝试用IGS发布的快速星历IGR、超快速星历(IGU、IGV)代替IGS最终星历进行基线解算。通过与IGS最终星历的解算结果对比发现,对同一等级的GNSS网,不同星历对基线、测站坐标精度均无明显影响,故在实际应用中用快速星历或超快速星历进行GNSS控制网解算是可行的。
In view of the delay about 12—18 days in the final precision ephemeris of IGS,which is not conducive to the real-time calculation of the GNSS engineering control network of class C and D.This paper attempts to use the fast ephemeris(IGR)and super-fast ephemeris(IGU,IGV)to calculate the baseline instead of the final ephemeris(IGS)as an example.By comparing with the final ephemeris of IGS,it is found that there is no obvious effect on the baseline and the coordinate accuracy.So it is feasible to use fast ephemeris or super-fast ephemeris to solve GNSS control network in practical application.
作者
李振宇
窦永杰
LI Zhenyu;DOU Yongjie(Surveying and Mapping Engineering Institute of Gansu Province,Lanzhou 730000,China;Gansu Emergency Surveying and Mapping Research Center,Lanzhou 730000,China)
出处
《测绘与空间地理信息》
2020年第1期150-152,159,共4页
Geomatics & Spatial Information Technology
关键词
精密星历
GNSS控制网
时效性
精度
precision ephemeris
GNSS control network
timeliness
precision
