空间探测用真空紫外光谱辐射计的校准  

Calibration of VUV spectroradiometers for space exploration

作　　者：孙红胜 梁新刚[1] 马维刚 王加朋 林冠宇 SUN Hongsheng;LIANG Xingang;MA Weigang;WANG Jiapeng;LIN Guanyu(School of Aerospace,Tsinghua University,Beijing 100084,China;Beijing Zhenxing Institute of Metrology and Measurement,Beijing 100074,China;Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China)

机构地区：[1]清华大学航天航空学院,北京100084 [2]北京振兴计量测试研究所,北京100074 [3]中国科学院长春精密光学机械与物理研究所,吉林长春130033

出　　处：《光学精密工程》2022年第7期765-772,共8页Optics and Precision Engineering

基　　金：国家自然科学基金国家重大科研仪器项目(No.D41527806);国防技术基础科研项目(No.JSJL2015204A012)。

摘　　要：为了实现115~200 nm的真空紫外光谱辐射计的校准,针对现有方法中校准源均匀性不高、量值传递链条长、校准波段下限不够的问题,设计了两种校准方法。基于标准漫反射板的校准方法中,研制了测量最低波段到115 nm的真空紫外双向反射分布函数(Bidirectional Reflectance Distribution Function,BRDF)/双向透射分布函数(Bidirectional Transmittance Distribution Function,BTDF)测量标准部件;基于标准辐射计的方法中,提出了相应的真空紫外光谱辐射亮度传递标准设计方法,标准视场角为2°,在真空条件下完成了实验验证;提出了一种标准真空紫外漫透射器制备方法,对标准真空紫外漫透射器的空间分布特性进行了测量,该方法在±10°角度范围内具有良好的均匀辐射朗伯特性。建立了校准装置,分析了各自的量值传递链条和测量不确定度,表明基于标准辐射亮度计的方法中减少了BRDF测量不确定度分量,测量不确定度更优。利用校准装置对风云卫星上的载荷进行了校准,115~200 nm波段光谱辐亮度测量不确定度为12%(k=2),载荷在轨运行良好。真空紫外光谱辐射计校准方法和装置对空间真空紫外探测技术的研究和应用具有重要的意义。The calibration method used for spectral radiance of the vacuum ultraviolet band(115-200 nm)was studied to calibrate the radiation parameter of VUV radiometer at 115 nm. Two calibration methods were designed to solve the following problems:low uniformity of calibration source,long value transfer chain,and insufficient lower limit of calibration band. In the method based on standard diffuse reflectors,the VUV bidirectional reflectance distribution function/bidirectional transmittance distribution function(BRDF/BTDF)measurement standard component was developed to measure the lowest wave band at 115 nm. In the method based on standard radiometer,the standard design method of spectral radiance transfer was proposed,and the experimental verification was completed with a field angle of 2°. A new preparation method of a standard vacuum ultraviolet diffuse transmitter was proposed and its measurement was carried out,revealing good Lambert characteristics in the range of ±10°. The calibration devices were developed and the value transfer chain and measurement uncertainty were analyzed,revealing a reduced BRDF measurement uncertainty component with better measurement uncertainty. A calibration test of payload on FY satellite was carried out using the calibration device. The uncertainty of spectral radiance measurement in the range of 115-200 nm is 12%(k=2),and the payload runs well in orbit. This research on the calibration method and VUV spectroradiometer is of great significance to the research and application of VUV space exploration technology.

关 键 词：紫外遥感 真空紫外 光谱辐亮度 漫透射 校准 测量不确定度 

分 类 号：TN23[电子电信—物理电子学]