713XD型全相参多普勒天气雷达回波强度定标

摘要

Weather radar is the quantitative measurement of the precipitation echo intensity device, And the weather radar echo intensity calibration precision, determines the accuracy measuring the intensity of precipitation weather radar. 713XD Doppler weather radar with different working mode, the radar working parameters of each work mode is not the same, plus Doppler signal processor (including the digital intermediate frequency receiver matched with the different) algorithm, resulting in weather radar echo intensity under different operation modes of different measurement value. The calibration procedures for matching and operation mode, the solution of the same echo of different modes of observation strength inconsistency problem. This paper expounds the basic principle of weather radar echo intensity calibration, analysis of the echo intensity observations and the reason for deviation and theoretical value, through the programming of the echo intensity of different under different working modes of calibration, and gives the calibration curve and the actual.%天气雷达是定量测量降水回波强度的设备，而天气雷达回波强度的定标精度，决定了天气雷达测量降水强度的准确性。713XD多普勒天气雷达的具有不同工作模式，每种工作模式雷达工作参数设置不相同，再加上多普勒信号处理器（包括与之配套使用的数字中频接收机）的算法不同，导致天气雷达回波强度在不同工作模式下测量值不同。采用与工作模式相配套的定标程序，解决了同一回波不同模式观测强度不一致的问题。文章阐述了天气雷达回波强度定标的基本原理，分析了回波强度观测值与理论值产生偏差的原因，通过编程实现了不同工作模式下不同的回波强度定标，并给出了实际的定标曲线。