Accoding to solar spectral radiation data abserved in Beijing, the increasing rate of spectral irradiation ratio are 3.8%、 -6.6%and 6.1%for ultraviolet, visible and infra-red radiation in recent 10 years.
Accoding to solar spectral radiation data abserved in Beijing, the increasing rate of spectral irradiation ratio are 3.8%、 -6.6%and 6.1%for ultraviolet, visible and infra-red radiation in recent 10 years.
据北京太阳分光辐射实测资料，近10年紫外、可见光和红外分光辐照比分别增长3.8%、-6.6%和6.1%。