太阳直射光谱和天空光谱的测量与分析

在海拔9600m高空测量并获得了大气上界直射太阳光谱和天空光谱，测量了成都、丽江和玉龙雪山地表直射太阳光谱和天空光谱.结果表明：(西昌段)大气上界直射太阳光谱能量最大峰值对应的波长位于482.1nm，天空光谱能量分布相对于直射太阳光谱能量分布明显紫移，0.41—0.42μm波段成为天空光谱能量第一主峰区；地表晴天天空光谱中的能量分布与直射太阳光谱的能量分布区别很大，而有云时天空光谱中的能量分布和直射太阳光谱能量分布的差别比较小；玉龙雪山山峰积雪雪面在可见光波段对不同波长有不同的反照率. 关键词： 太阳直射光谱 天空光谱 大气上界

Measurement and analysis of direct sunlight and skylight spectra

The extraterrestrial spectrum in the visible wavelength range of 340.5—818.6nm at the height of 9.6 km has been detected，furthermore，the upper sunlightand skylight spectra have been collected in different regions of Chengdu and Lijiang. The date and diagram indicated that 482.1nm is the hightest point in extraterrestrial direct solar spectra, and that of the extraterrestrial skylight spectra is shifted to 412nm. The skylight spectra registered on sunny and cloudy days are notably different. It was also found that the firn on top the Yulong Mountain has different albedos in different wavebands visible range.