一种天气雷达天线指向自动检测技术  

An Automatic Detection Technology for the Weather Radar Antenna Pointing Error

作　　者：张建云 张垚[2] Zhang Jianyun;Zhang Yao(China Huayun Meteorological Technology Group Corporation,Beijing 100081;Beijing Metstar Radar Co.,Ltd.,Beijing 100094)

机构地区：[1]中国华云气象科技集团公司,北京100081 [2]北京敏视达雷达有限公司,北京100094

出　　处：《气象科技进展》2018年第6期83-88,共6页Advances in Meteorological Science and Technology

摘　　要：目前主流业务天气雷达天线指向精度指标为0.1°,实际天线指向精度主要用太阳作为辐射源进行检测。其主要不足是实施太阳法检测雷达需停止正常的业务运转,不能实现自动在线检测,通常业务雷达每月检查一次。目前的大部分业务天气雷达系统内尚无天线指向的自动在线检测办法,而天气雷达是7×24 h的工作模式。产生天线角码的伺服系统包含机械传动装置和电子系统,部分故障导致业务雷达系统天线角码数据误差超过指标,且用户不知情的情况时有发生。提出了一种用激光探测器精度为0.05°的自动在线检测天线角码数据的方法,能满足业务需求,可有效保障带有天线罩的业务天气的雷达角度数据质量。The current prevalent weather radar antenna pointing accuracy parameter is 0.1°,and the main controlling method of weather radar antenna pointing error is sun check calibration,which is an offline checking method using the sun as an absolute reference.Due to the offline method that radars need to stop normal scanning operations when implementing the sun check calibration every month.At present,most of the operational weather radars systems do not have an automatic online detection method for the antenna pointing in a 7×24 h working mode.The Servo system that generates antenna angles is made up of mechanical transmissions and electronic systems,its partial faults may lead to antenna pointing errors exceeding the tolerance while the radar is usually not aware of it.Here,we propose a method of automatic online detection of antenna pointing by using a laser detector with an accuracy of 0.05°.It can guarantee the weather radar working more effectively to fulfill monitoring and early warning.

关 键 词：天线指向精度 激光探测器 自动在线检测 

分 类 号：P415.2[天文地球—大气科学及气象学]