Abstract: In September 2015, four dual-polarized weather radars of X-band were set up and conducted the observation test in Beijing area by Beijing Meteorological Bureau. Based on the observation data of the three radars on 30 June 2016, the observation parameters of radars have been conducted initial quality assessment by using the statistical method of standard deviation distribution. The results are as follows: (1) The 73.5%-77.9% of the total observation data of the reflectivity from the three radars conformed to the theoretical standard deviation distribution. It suggested that the fluctuation of the reflectivity data basically conformed to the theoretical distribution. (2) The 68.4%-81.4% of the total observation data of the differential reflectivity conformed to the theoretical standard deviation distribution. The fluctuation of data from Fangshan radar was the largest among the three radars. (3) For the cross correlation coefficient among the three radars, 45.7%-63.5% of the standard deviations conformed to the theory value. The data from Fangshan radar fluctuated most while data from the rest two radars showed the same scale of fluctuation. (4) For the standard deviations of differential-phase, 73.5%-83.9% of the data showed consistency with theoretical data. The fluctuation of data from Fangshan radar was relatively large. Compared with the other three observation parameters of radars, the variation of differential-phase was relatively small. 

Key words: X-band, dual line polarization radar, standard deviation distribution, data quality evaluation

摘要： 2015年9月，北京市气象局在北京地区架设4部X波段双线偏振天气雷达并开展了观测试验。本文利用其中3部雷达在2016年6月30日的观测数据，用标准差分布统计方法，对雷达的观测参量进行初步质量评估。结果表明：（1）3部雷达反射率标准差符合理论值的数据占总观测数据的73.5%～77.9%，反射率的数据波动基本符合理论分布；（2）3部雷达差分反射率标准差符合理论值的数据占总观测数据的68.4%～81.4%，其中房山雷达数据波动较大；（3）3部雷达互相关系数标准差符合理论值的数据占总观测数据的45.7%～63.5%，其中房山雷达数据波动最大，其他2部雷达都有同程度的数据波动；（4）3部雷达差分传播相位标准差符合理论值的数据占总观测数据的73.5%～83.9%，其中房山雷达数据波动相对较大，与雷达其他观测参量相比，差分传播相位的波动较小。

关键词: X波段, 双线偏振雷达, 标准差分布, 数据质量评估