星载太阳紫外光谱监视器的地面辐射定标

星载太阳紫外光谱监视器是一种小型化、高精度紫外-真空紫外光谱辐射计,它有两种工作模式,即探测太阳紫外光谱辐照度的太阳模式和探测大气的太阳后向散射紫外光谱辐亮度的大气模式。对应这两种工作模式分别建立了紫外-真空紫外光谱辐照度和紫外光谱辐亮度定标装置。光谱辐照度标准灯直接辐照仪器的漫反射板进行仪器的光谱辐照度响应度定标,光谱辐照度标准灯辐照标准漫反射板形成朗伯面光源进行仪器的光谱辐亮度响应度定标。误差分析表明:160~250 nm光谱辐照度绝对定标误差为6.5%,250~400 nm为4.3%;250~400 nm光谱辐亮度绝对定标误差为5.9%。星载太阳紫外光谱监视器获得的地外太阳紫外光谱辐照度与大气的太阳后向散射光谱辐亮度数据,同国际上的观测结果相比一致性达±10%。

Radiometric Calibration on Ground of Satellite-Borne Solar Ultraviolet Spectral Monitor

Solar ultraviolet (UV) spectral monitor (SUSM) is a compact, high-precision satellite-borne spectroradiometer designed to measure the solar ultraviolet-spectral irradiance and the solar backscatter vltraviolet-spectral radiance from the atmosphere under two different work modes. The calibration setup is presented. A spectral irradiance standard lamp directly illuminates the diffuser of the solar ultraviolet spectral monitor to calibrate the solar ultraviolet spectral monitor spectral irradiance responsivity and a standard diffuser illuminated by the standard lamp as Lambert surface source is used to calibrate the solar ultraviolet spectral monitor spectral radiance responsivity. The measurement error analysis shows that the 160～250 nm spectral irradiance calibration error is 6.5%, the 250～400 nm spectral irradiance calibration error is 4.3% and the 250～400 nm spectral radiance calibration error is 5.9%. The data of solar ultraviolet spectral irradiance and the solar backscatter UV spectral radiance obtained by solar ultraviolet spectral monitor agrees with the internationally published data within ±10%.