摘要
保证移动X波段双偏振多普勒天气雷达在野外探测中雷达探测数据源的正确性,是预报员开展后续应用研究的重要前提。简要分析了差分反射率、相关系数、差分传播相移与差分相移系数的理论意义,同时结合多次观测经验,重点研究并验证了各双偏振产品在纯降水中的数值,研究双偏振参数对雷达硬件故障的指示意义,确保在探测时及时发现硬件故障与差损,提高探测数据质量。讨论了双偏振参数自测试校验,进行水平通道与垂直通道参数偏差校验,确保在探测之前获得双偏振通道的一致性。
The correctness and accuracy of observation data of X-band dual polarization Doppler weather radar are important prerequisites for subsequent application researches.The theoretical meaning of differential reflectivity,correlation coefficient,and differential phase shift are analyzed,and in combination with the experiences from several observation activities,the values of various polarimetric products in pure precipitation are studied and verified.Meanwhile,the polarimetric parameters for indicating the presence of hardware attenuation and faults are studied.The verification procedures of each parameter before observation are described.The TSG（Test Signal Generator） is used to ensure the consistency between horizontal and vertical channels.
出处
《气象科技》
北大核心
2011年第5期608-614,共7页
Meteorological Science and Technology
关键词
差分反射率
相关系数
差分相移
自测试校验
differential reflectivity
correlation coefficient
differential phase shift
built-in test
