摘要
为了实现对太阳直接光谱辐照度的地基观测,研制了一台用于测量太阳直射光谱辐照度绝对值的扫描式紫外光谱辐射计,工作波段250～400nm,通过太阳跟踪器及二维转台等设备实现地基观测时对太阳的自动跟踪。以NIST标准光源标定了这台光谱辐射计光谱辐照度响应度,定标误差2.4%。在云南丽江地区(26°52′N,100°13′E)开展的地面太阳直射紫外光谱辐照度观测试验进一步检验了仪器的性能。结果表明:时间、云量和大气气溶胶等因素对抵达地表的太阳直射紫外光谱辐照度有直接的影响。
In order to measure the solar direct spectral irradiance, a scanning spectral radiometer which can measure solar direct spectral irradiance from 250-400 nm was designed. A solar tracker and rotary table were used to trace the sun automatically while the radiometer measured the solar direct spectral irradiance.The irradiance response of the spectral radiometer was calibrated by a standard spectral irradiance lamp traceable to NIST. The calibration error of irradiance response was 2.4%. To test the whole system performance, measurements of solar direct irradiance was carded out in Lijiang （26°52＇N, 100°13＇E）. The experimental results show that the instrument can meet the measurement requirement, and some elements including time, cloud cover and aerosol have important influence on solar direct spectral irradiance arriving at earth ground.
出处
《红外与激光工程》
EI
CSCD
北大核心
2008年第3期530-533,共4页
Infrared and Laser Engineering
关键词
紫外
光谱辐射计
太阳跟踪器
光谱辐照度
Ultraviolet
Spectral radiometer
Solar tracker
Spectral irradiance
