摘要
为了研究紫外辐照对星载太阳辐射监测仪的绝对辐射计锥腔吸收率的影响,进行了实验室模拟测量实验。用相当于太阳紫外辐照总量的汞灯照射绝对辐射计的锥腔,定期用可同时测量镜、漫反射率的全半球反射比吸收率测量装置测量其吸收率,监测其随时间变化情况。实验结果表明:太阳辐射监测仪在风云三号卫星上例行工作一年接收的紫外辐射量,使其吸收率下降0.002%,最大下降0.003%,该结果同国外星上测量结果基本一致。本实验反映出紫外辐照对绝对辐射计锥腔的吸收率是有影响的,可为将来的星载太阳辐射监测仪优化、实验、测量和校正提供必要的参考。
To investigate the influence of the solar UV radiation on the absorptivity of the cavity of absolute radiometer of solar irradiance monitor on satellites, a simulated experiment is carried out in laboratory. A hydragyrum lamp with irradiance equaled to the total solar UV irradiance is used to irradiate the cavities. The change of the absorptivity of the cavity with the UV radiation quantum is measured by an integrating measurement instrument on the reflectance of black cavity within a full hemisphere （include the entrance of the Ulbrichtsphere）, which can measure the absorbance of the mirror reflection and the diffused reflection in a high precision simultaneously. The results show that the UV radiation received by the solar irradiance monitor on FY-3 satellite will cause the absorptivity degradation of the cavity of absolute radiometers of 0. 002% per year, and the most is 0. 003% per year. The result is consistent with the changing instance of other absolute radiometers for measuring solar irradiance on other satellites basiclly. The experiment indicates that the UV irradiance has influence on the absorptivity of the cavity of absolute radiometer on satellites. The reSult also might supply essential reference for optimization, experiment, measurement and calibration of the solar irradiance monitor on satellites in future.
出处
《光学精密工程》
EI
CAS
CSCD
北大核心
2006年第5期775-780,共6页
Optics and Precision Engineering
基金
应用光学国家重点实验室开放基金(No.DA04Q07)
关键词
太阳辐射监测仪
绝对辐射计
锥腔
紫外辐照
吸收率
solar irradiance monitor absolute radiometer cavity UV radiation absorptivity
