发散光照射方法标定空间紫外遥感仪器光谱辐照度响应度

Spectral Irradiance Responsivity Calibration of Space Ultraviolet Remote Sensing Instrument by Diverging Light Illuminating Method

以辐射度学为理论基础,推导出了发散光和平行光两种照射方法标定的空间紫外遥感仪器光谱辐照度响应度的结果表达式,分析了影响两种照射方法定标结果的因素。通过相关的测试实验,数值估算了采用发散光照射方法为仪器进行辐照度定标时所引入的定标方法误差。计算结果表明,在假设平行光辐照度值均匀及发散光源为朗伯光源的情况下,采用发散光照射方法定标时所引入的定标方法误差小于1.2%。数值估算结果对于采用发散光照射方法为空间紫外遥感仪器进行光谱辐照度定标具有一定的指导意义。

On the basis of radiation theory, the result expressions of spectral h-radiance responsivity calibration of space ultraviolet remote sensing instruments are deduced by diverging light illumination method and parallel light illumination method. The factors which impact the calibration results of two methods are analyzed. The calibration method error of diverging light illumination method is calculated through the relevant testing. The calculation results show that the calibration method error of diverging light illumination method is 0.5-1.2% in the assumed condition that parallel light irradiance is uniform and the diverging light source is the Lambert source. The calculation result has some guidable significance for carrying on spectral irradiance responsivity calibration of space ultraviolet remote sensing instrument by diverging light illuminating method.