介绍了自行研制的太阳反射波段超光谱辐照度仪的光机系统设计。仪器的光谱范围为400~2500 nm,包括三个分光探测单元,可实现太阳总辐照度、天空漫射辐照度、太阳直射辐照度和漫总比的长期自动测量。为验证光机系统设计的合理性,对外场实验数据进行了分析。通过与传统人工测量漫总比数据的对比,发现两种方法的漫总比偏差小于2%。仪器具备与传统测量方式相当的辐照度测量精度,在卫星遥感器自动化定标中具有一定的优势。

The opto-mechanical system design of self-developed irradiance spectroradiometer in reflective solar bands is introduced. The instrument has a spectral range of 400-2500 nm, including three spectral modules, and it can achieve automatic long-term measurement of total solar irradiance, diffuse sky irradiance, direct solar irradiance and the ratio of diffuse irradiance to full irradiance. In order to verify the rationality of the opto-mechanical design, we analyze the field experimental data. Comparing with the ratio data of the traditional manual measurement, it is found that the ratio deviation of the two methods is less than 2%. The instrument has the same irradiance measurement accuracy comparable to the traditional measurement method, and has certain advantages in the automatic calibration of satellite remote sensor.