摘要
为了考察真空环境对太阳辐照度绝对辐射计辐射测量值及其对世界辐射基准修正系数的影响,提高在轨辐射测量值向世界辐射基准的溯源精度,改善不同仪器在轨辐射量值的一致性,进行了真空环境中太阳辐照度绝对辐射计腔温响应变化及其影响的测量和评估。真空环境中,由于缺少了空气对流这一传热途径,使得在相同的加热功率下,辐射计腔温响应的时间常数变长,并且平衡温度升高,导致辐射计黑体腔响应度明显降低。在真空和空气中,对相同的测量目标进行辐射测量,结果表明由于真空中黑体腔时间常数和响应度的变化,导致测量的辐射功率有0.15%的相对偏差,进而造成真空环境中的辐射测量值向世界辐射基准的修正系数发生0.15%的相对变化。
In order to investigate the influence Of vacuum environment on the measured value of solar irradiance absolute radiometer （SIAR） and its auxiliary value to the world radiometric reference （WRR）, and improve the tracing accuracy of on-orbit solar irradiance measurements to WRR and consistency of measurements of different onorbit instruments, the variation of cavity tempreture response and its effect of SIAR in vacuum environment are measured and estimated. Since the absence of air convection in vacuum, the time constant of SIAR cavity temperature response becomes longer and the equilibrium temperature becomes higher in the same heating power with that in air, thus the responsibility of SIAR cavity is significantly reduced. The radiometric measurement results of the same target in vacuum and air environment show a relative difference of 0. 15% between the measured irradiances since the variation of time constant and responsibility, which causes 0.15 % changes in the auxiliary value of radiometric measurements in vacuum to WRR.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2013年第9期185-190,共6页
Acta Optica Sinica
基金
国家自然科学基金(41227003)
关键词
测量
温度响应
绝对辐射计
太阳总辐照度
世界辐射基准
measurement temperature response
absolute radiometer solar total irradiance world radiometric reference
