• 关键词：毫米波云雷达  激光云高仪  云底高度

• 基金项目：广东省科技计划项目（科技创新平台类）（No.2019B121201002）；广州市科技计划项目（No.202206010016）；广州市气象局大城市智慧观测与数据应用创新团队项目

• 顾桃峰
• 广州市突发事件预警信息发布中心， 广州 511430

• 岳海燕
• 广州市气象台， 广州 511430

• 伍光胜
• 广州市突发事件预警信息发布中心， 广州 511430

• 张志坚
• 广州市突发事件预警信息发布中心， 广州 511430

• 胡涵成
• 成都信息工程大学光电工程学院， 成都 610225

• 蒲冬阳
• 成都信息工程大学电子工程学院， 成都 610225

• 罗语嫣
• 成都信息工程大学大气科学学院， 成都 610225

• 蔡英琪
• 广州市突发事件预警信息发布中心， 广州 511430

• 摘要：为评估毫米波云雷达及激光云高仪的探测性能，选取广州市气象局KA波段毫米波云雷达和激光云高仪云高观测数据，通过对比两种测云设备在相同条件下的差异，分析不同要素对观测设备的影响，结果表明：①毫米波云雷达与激光云高仪同时探测到有云时，二者在云底高度观测上吻合程度较高，相关系数为0.98；②在数据获取率上，云雷达对高云的探测能力明显优于激光云高仪，但在对低云的探测能力上还有待提高，和激光云高仪相比，云雷达对低云和中云的识别能力有待提高；③对于多层云的观测，低层云的遮挡降低了激光云高仪对中高层云的观测，激光云高仪探测的中高层云多数在云雷达的回波内部.④对于不同强度的降水，日降水量越多，该天所测得的高、中云层回波就越少.⑤通过边界层高度与污染物的关系分析可以得出，边界层高度与PM _2.5浓度呈反比.这些研究能够对毫米波云雷达和激光云高仪的探测能力进行评估，为后续选择设备提供参考，也推动了云观测技术的发展.

• Abstract：In order to evaluate the detection performance of millimeter wave cloud radar and laser cloud altimeter （Altimeter）， this paper selected the observation data of KA band millimeter wave cloud radar and Altimeter of Guangzhou Meteorological Bureau， and analyzed the influence of different elements on the observation equipment by comparing the differences between the two cloud measurement equipment under the same conditions. The results show that： ① When both millimeter wave cloud radar and Altimeter detect clouds at the same time， they have a high degree of coincidence in the observation of cloud base height， and the correlation coefficient is 0.98. ② In terms of data acquisition rate， the detection ability of cloud radar for high clouds is obviously better than that of Altimeter， but the detection ability of low clouds needs to be improved. Compared with Altimeter， the recognition ability of cloud radar for low and middle clouds needs to be improved. ③For the observation of multi-layer clouds， the occlusion of low layer clouds reduces the observation of middle and high layer clouds by Altimeter， and most of the middle and high layer clouds detected by Altimeter are inside the echo of cloud radar. ④For the precipitation of different intensity， the more daily rain it rains， the less echo of high and middle clouds measured by Altimeter can get. ⑤Through the analysis of the relationship between boundary layer height and pollutants， it can be concluded that the boundary layer height is inversely proportional to the concentration of PM _2.5.These studies can evaluate the capabilities of millimeter wave cloud radar and Altimeter， provide reference for the subsequent selection of equipment， and promote the development of cloud observation technology.

• Key words：millimeter wave cloud radar  laser cloud altimeter  cloud base height

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