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首页> 外文期刊>Journal of atmospheric and oceanic technology >Operational Monitoring of Radar Differential Reflectivity Using the Sun
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Operational Monitoring of Radar Differential Reflectivity Using the Sun

机译：使用太阳对雷达差分反射率进行操作监控

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摘要

A method for the daily monitoring of the differential reflectivity bias for polarimetric weather radars is presented. Sun signals detected in polar volume data produced during operational scanning of the radar are used. This method is an extension of that for monitoring the weather radar antenna pointing at low elevations and the radar receiving chain using the sun. This "online" method is ideally suited for routine application in networks of operational radars.rnThe online sun monitoring can be used to check the agreement between horizontal and vertical polarization lobes of the radar antenna, which is a prerequisite for high-quality polarimetric measurements. By performing both online sun monitoring and rain calibration at vertical incidence, the differential receiver bias and differential transmitter bias can be disentangled. Results from the polarimetric radars in Trappes (France) and Bornholm (Denmark), demonstrating the importance of regular monitoring of the differential reflectivity bias, are discussed.rnIt is recommended that the online sun-monitoring method, preferably in combination with rain calibration, is routinely performed on all polarimetric weather radars because accurate calibration is a prerequisite for most polarimetric algorithms.
机译：提出了一种每日监测偏振气象雷达差分反射率偏差的方法。使用在雷达运行扫描期间产生的极地体积数据中检测到的太阳信号。此方法是对监视低海拔的天气雷达天线以及使用太阳的雷达接收链进行监视的方法的扩展。这种“在线”方法非常适合在操作雷达网络中的常规应用。在线阳光监测可用于检查雷达天线水平和垂直极化波瓣之间的一致性，这是高质量极化测量的先决条件。通过在垂直入射方向上执行在线太阳监测和降雨校准，可以消除差分接收器偏置和差分发射器偏置。讨论了Trappes（法国）和Bornholm（丹麦）的偏振雷达的结果，这些结果证明了定期监测微分反射率偏差的重要性。建议建议使用在线太阳监测方法（最好与雨量校准结合使用）通常在所有极化气象雷达上执行，因为精确校准是大多数极化算法的前提。

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