摘要
天线罩是一种为保护天线正常工作而设置在天线外部的结构物。为避免受到外部机械损伤,保证天线的电性能以维持正常运行,许多北斗/GNSS基准站的天线都会使用天线罩进行遮盖。由于天线罩本身材质特殊,不同型号天线受其影响不同,特别是对北斗/GNSS高程解算影响差异显著。本文首先给出了天线罩对北斗/GNSS信号吸收和折射基本原理,然后针对北斗/GNSS基准站更换天线或者天线罩时对定位、特别是高程方向的影响,提出了使用偏心观测量进行重新标定的方法。基于广东省北斗地基增强系统测试结果表明该方法可以有效改正天线罩的影响,满足北斗地基增强系统基准站坐标精度的要求。
Radome is structure arrangedoutside the antenna to protect the normal operation of the antenna.In order to avoid external mechanical damage and ensure the electrical performance of the antenna to maintain normal operation,the antennas of many Beidou/GNSS reference stations are covered with radomes.Due to the special material of radome,different types of antenna are affected differently,especially for Beidou/GNSS elevation calculation.In this paper,the basic principle of radome absorbing and refracting Beidou/GNSS signal is given firstly.Then,aiming at the influence of replacing antenna or radome on positioning and epecially elevation direction of Beidou/GNSS reference station,a new calibration method using eccentric observation is proposed.The test results based on Guangdong Beidou ground augmentation system show that the method can effectively correct the influence of radome and meet the requirements of coordinate accuracy of Beidou ground augmentation system reference station.
作者
余壁宏
戚克培
YU Bihong;QI Kepei(Guangdong Institute of land and resources surveying and mapping,Guangzhou 510500,China;GNSS Research Center,Wuhan University,Wuhan 430072,China)
出处
《地理信息世界》
2021年第5期47-51,共5页
Geomatics World
