激光云高仪试验数据对比分析

Comparative Analysis of Cloud Ceilometer Observational Experiment

文章介绍了2014年6-10月在北京市观象台和长沙气象局开展的激光云高仪的对比观测试验和结果。参与此次为期3个多月试验的仪器来自4个厂家、共5种型号的15台仪器参加了对比试验,试验采用了HY-CL51型激光云高仪与CYY-2B型激光云高仪的测量结果作为标准云高,人工观测结果辅助判断,提出了云高标准值的确定方法和云高有效观测样本的选取方法,测试了不同型号激光云高仪的各项性能。结果表明:不同型号的激光云高仪均存在漏判和误判现象,雾、霾天气对仪器的漏判和误判会造成较大的影响,部分型号的仪器样本准确率整体较高,各项性能指标能够达到业务要求。

The test procedure and result analysis of the comparative observation experiment on some laser ceilometers at Beijing Meteorological Observatory and Changsha Meteorological Service from June to October 2014 are introduced.Fifteen instruments from four manufacturers were tested in the experiment that lasted for more than three months.The experiment used the observation results of HY-CL51 and CYY-2B Laser Ceilometers as the standard cloud heights.The artificial observations played a subsidiary role in testing the accuracy of these instruments when cloud heights are detected.The results show that observation omission and misjudgment tend to happen to all these laser ceilometers.Fog and haze impact the performance of the instruments significantly.Comparatively,HY-CL31 has a higher accuracy rate,which can meet the needs of meteorological service.