国产地球辐射表长波滤光罩性能的测试研究
THE PERFORMANCE MEASUREMENT OF CHINA-MADE SILICON DOMES OF PYRGEOMETER
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摘要: 滤光罩是地球辐射表的关键部件, 其性能直接影响着该仪器的性能与质量.利用LOWTRAN 7和国产各种滤光罩实测的光谱透射比数据, 对不同的模式大气下各滤光罩有效透射比等性能指标进行计算, 并与Eppley罩的研究情况作了对比.结果表明, 国产罩的各项性能指标并不次于Eppley罩.
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关键词:
- 地球辐射表长波滤光罩性能测试
Abstract: The dome is a key component of pyrgeometer, the performance of which would influence the quality of pyrgeometer. By using the data Lowtran 7 and the data of transmittance for some kinds of China-made domes, the performance indexes of effective transmittance for some kinds of domes are calculated in different model atmospheres. The results show that the performance indexes of China-made dome are not lower than those of Eppley.-
Key words:
- Pyrgeometer
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图 2 Eppely硅罩No.8 (a) 和No.4 (b) 的实测光谱透射比[5]
表 1 国产滤光罩不同波长范围内的平均透射比
表 2 国产罩的有效透射比及模式大气的水汽含量u (g·cm-1) 和辐照度F (W·cm-2)
表 3 国产罩有效透射比与模式大气中的水汽含量和半球向辐照度之间的相关系数 (Ru, RF)
表 4 国产罩在3~4 μm范围内不同透射比所在的波长 (单位:μm)
表 5 Eppley滤光罩的有关技术性能参数[5]
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