净全辐射表两种校准方法比较  

Comparisons of Two Calibration Methods for the Net Pyrradiometer

作　　者：杨云[1] 吕文华[1] 付锡贵[1] 王冬[1] 丁蕾[1] 

机构地区：[1]中国气象局气象探测中心,北京100081

出　　处：《应用气象学报》2009年第6期761-766,共6页Journal of Applied Meteorological Science

摘　　要：该文介绍了净全辐射表的两种校准方法。使用长短波辐射表组成的净全辐射标准器组,在不同环境条件下对现用标准净全辐射表和6台气象台站用工作级净全辐射表的灵敏度进行了测试,通过试验了解检定环境条件下新的标准器组与现用标准器之间的关系,分析了通过不同标准器组得到的工作级净全辐射表的测量结果,得到了新的标准器组使用后检定结果的随机误差。通过数据对比分析,得出使用新的标准组检定的净全辐射表,其不确定度白天降低9.2%,夜间降低5.2%。China doesn＇t conduct operational observations of net radiation until the 1990s,when the remote detection for radiation is applied.Temporary reference standard for the net pyrradiometers is based on 3 CN-11 type net pyrradiometers which are imported from Japan in 1980.The structures of CN-11 net pyrradiometers and homemade pyrradiometers are of the same.The inductive parts consist of the thermopile and two black inductive surfaces.The black inductive surface can receive the whole wave-band radiation with the wavelength 0.3—100 μm.The upper inductive surface receives the whole radiation from the sky and the lower surface receives the radiation from the earth surface.The net pyrradiometer is more complex than other radiometers because of two inductive surfaces and the broad range of received radiation.To stop wind and protect the inductive surface,a polyvinyl film cover is installed.But the measuring uncertainty is increased by it because the film cover is difficult to clean and keep sealed,while it gets distorted and aging easily.According to the suggestions of WMO,two pyrgeometers（CG4） and two pyranometers（PSP） are used together as the new standard group.Under different environment conditions,six working net pyrradiometers are calibrated using four components method as well as the CN-11 type pyrradiometer standard group and the results are analyzed.Experiments are conducted to provide scientific basis for the updating of standard group,through which the relationship between the new standard group and the old standard group in the calibration environment are found out.The random error of the results using the new standard group is calculated.Analysis suggests the measuring accuracy can be improved 9.2% than before in daytime and 5.2% at night after using the new standard group.The data of the net pyrradiometers calibrated by the new standard group prove to be closer to the true value.In September 2005,two CG4 type pyrgeometers are traced to the infrared radiation standard of World Radiation Center（W

关 键 词：净全辐射 标准器组 灵敏度 不确定度 

分 类 号：TH765[机械工程—仪器科学与技术]