利用双极性天线探测及削弱多路径效应的方法  

The Method of Using Bipolar Antenna to Detect and Reduce Multipath Effect

作　　者：张艳红 张鹏[2] 赫雲辉 ZHANG Yanhong;ZHANG Peng;HE Yunhui(Guangzhou Urban Planning Survey and Design Institute, Guangzhou Guangdong 573199, China;Key Laboratory of Precise Engineering and Industry Surveying, National Administration of Surveying, Mapping and Geoinformation, Wuhan Hubei 430079, China;Beijing CNNC Institute of Surveying and Mapping Company Limited, Beijing 101300, China)

机构地区：[1]广州市城市规划勘测设计研究院,广东广州573199 [2]精密工程与工业测量国家测绘地理信息局重点实验室,湖北武汉430079 [3]北京中色地科测绘有限公司,北京101300

出　　处：《北京测绘》2021年第7期942-946,共5页Beijing Surveying and Mapping

摘　　要：多路径效应是影响卫星定位精度和稳定性的重要因素。由于多路径误差的非时空相关性,使其成为双差模型中较难解除的误差源。针对多路径环境复杂多变、难以进行分析的问题,提出一种利用双极性天线探测多路径的方法,同时提出基于双极性天线左右旋载噪比输出值之差衡量卫星质量的方法。若左右旋载噪比输出值之差较大,则认为卫星质量较好;否则,则认为此卫星质量较差。利用开源程序包(RTKLIB)进行基线解算的过程中剔除此卫星,使此卫星不参与基线解算的过程,若剔除此卫星前后解算结果的固定率有所提高,则认为多路径效应有所削弱。Multipath effect is an important factor affecting the accuracy and stability of satellite positioning.Due to the non-temporal and spatial correlation of multipath errors,multipath effect becomes a more difficult error source in the double-difference model.Aiming at the problem that the multipath environment is complex and changeable and difficult to analyze,this paper proposed a method to detect multipath using a bipolar antenna,and a method to measure the satellite quality based on the difference in the output value of the left and right rotation carrier-to-noise ratio of the bipolar antenna.If the difference between the output values of the left and right rotation carrier-to-noise ratio is large,the satellite is considered to be of good quality;otherwise,the satellite is considered to be of poor quality.The relative staellite is eliminated during the baseline calculation process using RTKLIB,so that the satellite does not participate in the baseline calculation process.If the fixed rate of the calculation results before and after the removal of this satellite increases,the multipath effect is considered to be weakened.

关 键 词：双极性天线 多路径效应 右螺旋圆极化(RHCP) 左螺旋圆极化(LCHP) 

分 类 号：P228.4[天文地球—大地测量学与测量工程]