摘要
由气象雷达方程可知,发射机峰值功率与雷达常数C_0相关,影响雷达回波反射率的测量,若发射机峰值功率实时测量存在误差,将导致回波反射率的测量误差。文章分析了影响发射机峰值功率测量误差的主要原因,并使用频谱仪、外接信号源、外置功率计、射频分析仪等相关仪表对引起发射功率测量误差因素进行了校准和检验,提出了减小系统误差和随机误差的方法,提高了脉冲雷达峰值功率测量准确度,修正了天气雷达回波强度标定结果。
It can be seen from the meteorological radar equation that the peak power of transmitter is directly related to the radar constant C 0,which affects the measurement of radar echo reflectance.This paper analyzes the main reasons affecting the measurement error of transmitter peak power.The error factors of transmitting power measurement are calibrated and tested by using spectrum analyzer,external signal source,external power meter,radio frequency analyzer and other related instruments.A method to reduce systematic error and random error is proposed.The measurement accuracy of pulse radar peak power is improved and the calibration result of weather radar echo intensity is corrected.
作者
安克武
黄晓
王龙
An Kewu;Huang Xiao;Wang Long(Xinjiang Meteorological Technology&Equipment Support Center,Urumchi 830002)
出处
《气象水文海洋仪器》
2020年第3期32-35,共4页
Meteorological,Hydrological and Marine Instruments
基金
中国气象局气象探测工程技术研究中心(课题名称:雷达发射机功率在线测量关键技术研究)资助.
关键词
发射功率
误差分析
误差校准
误差检验
transmit power
error analysis
error calibration
error examination
