BDS+QZSS双系统组合PPP性能评估

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英文篇名：Performance Evaluation of BDS+QZSS Dual System Combination PPP 作者：张玉英 ; 谭荣建 ; 布金伟 ; 李国柱 ; 张东升 英文作者：Zhang Yuying;Tan Rongjian;Bu Jinwei;Li Guozhu;Zhang Dongsheng;Faculty of Land Resource Engineering,Kunming University of Science and Technology;HI-GIS Geographic Information Technology Co.,Ltd; 关键词：BDS+QZSS ; 可见卫星数和DOP值 ; PPP ; 定位性能评估 英文关键词：BDS+QZSS;;visible satellite number and DOP value;;PPP;;evaluation of positioning performance 中文刊名：城市勘测 英文刊名：Urban Geotechnical Investigation & Surveying 机构：昆明理工大学国土资源工程学院;云南海钜地理信息技术有限公司; 出版日期：2019-04-30 出版单位：城市勘测 年：2019 期：02 语种：中文; 页：109-115 页数：7 CN：42-1309/TU ISSN：1672-8262 分类号：P228

摘要

利用MGEX跟踪站的观测数据分别从可见卫星数、DOP值、静态PPP和动态PPP几个方面对BDS+QZSS卫星导航系统的定位性能进行评估与分析。分析结果表明:BDS+QZSS组合系统定位比BDS单系统定位具有较优的空间几何构型分布;静态PPP方面,E、N和U方向上,BDS+QZSS定位收敛速度比BDS单系统快,定位稳定性也优于BDS单系统,U方向上改善效果比E和N方向显著;动态PPP方面,在高度角较大时(40°),U方向上改善率达到17%以上,BDS+QZSS组合系统比BDS单系统在低高度角情形下改善较为明显。E、N和U三个方向BDS单系统全天内的可用历元下降,一天仅有50%左右可用历元,而BDS+QZSS组合可用历元较多,此时两种模式的定位误差都较大,各个方向的离散程度都较差,BDS+QZSS组合对定位精度的改善有限,但BDS+QZSS组合与BDS单系统相比仍能有一定的改善效果。可见,QZSS卫星的加入,能够增强BDS卫星的定位精度、可靠性和稳定性。
        The positioning performance of BDS+QZSS satellite navigation system is evaluated and analyzed from visible satellite number,DOP value,static PPP and dynamic PPP using the observation data of MGEX tracking station.The results show that the BDS +QZSS system has a better spatial geometric distribution than the BDS single system positioning,and the convergence rate of BDS+QZSS positioning in the direction of PPP is faster than that of the BDS system in the direction of E,N and U.The stability of positioning is better than that of single BDS system,and the improvement effect in U direction is better than that in E and N directions,and in the aspect of dynamic PPP,the height angle is higher than that in dynamic PPP system.The improvement rate of large time(40°),U direction is more than 17%,and the improvement of BDS+QZSS combination system is more obvious than that of BDS single system at low altitude angle.The available epoch of BDS single system in three directions of E,N and U decreases in the whole day,and only about 50%of epoch is available in one day.However,the BDS+QZSS combination can be used in many epochs.At this time,the positioning errors of the two modes are both large,and the dispersion degree of each direction is poor.The improvement of the positioning accuracy is limited by the BDS+QZSS combination,but the BDS+QZSS combination can still have some improvement effect compared with the BDS single system.Thus,the addition of QZSS satellite can enhance the positioning accuracy,reliability and stability of BDS satellite.

引文

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