赣州新一代天气雷达数据质量分析

Analysis on Data Quality of Ganzhou New Generation Weather Radar

基于江西省赣州、吉安和广东省韶关雷达数据,采用CAPPI算法,对比分析了赣州与吉安、韶关雷达1 km和2 km高度反射率。结果表明:赣州雷达与吉安、韶关雷达在强(弱)降水过程探测到的反射率变化趋势均具有较好的一致性,但反射率值略有差异,赣州雷达反射率略高于吉安、韶关雷达反射率;对于个例而言,在1 km高度上赣州雷达反射率要高于吉安雷达反射率0~5 dBZ,在2 km高度上赣州雷达反射率要高于吉安雷达反射率0~3 dBZ;赣州雷达弱降水过程探测到的反射率与韶关雷达探测结果基本一致,但在强降水过程探测到的反射率比韶关雷达偏高0~5 dBZ。

Based on the radar data of Ganzhou,Ji'an in Jiangxi Province and Shaoguan in Guangdong Province,the CAPPI algorithm was used to comparatively analyze the 1 km and 2 km height reflectivity of radars in Ganzhou,Ji'an and Shaoguan.The results show that the reflectivity change trends detected by Ganzhou radar and Ji'an and Shaoguan radar during heavy(weak)precipitation processes are consistent,but the reflectivity values are slightly different.The reflectivity of Ganzhou radar is slightly higher than that of Ji'an and Shaoguan.Radar reflectivity;for individual cases,the reflectivity of Ganzhou radar is 0~5 dBZ higher than that of Ji'an radar at an altitude of 1 km,and the reflectivity of Ganzhou radar is 0~3 dBZ higher than that of Ji'an radar at an altitude of 2 km;Ganzhou radar reflectivity The reflectivity detected during weak precipitation is basically consistent with the detection results of Shaoguan radar,but the reflectivity detected during heavy precipitation is 0~5 dBZ higher than that of Shaoguan radar.