为获取更精细的背景辐亮度分布信息,提出基于光纤光谱仪和二维转台对全天空背景光谱辐射进行测量的方法。可实现定点观测及全天空扫描两种工作方式。详细介绍了测量原理、系统的组成、定标的原理及方法等。经过一次全天空扫描可获得649个光谱辐射亮度采样样本,每个样本的光谱分辨率为0.5 nm。各个样本测量位置作为像素点,相应位置上各波段的辐亮度值作为灰度值,可得到各波段的全天空背景光谱辐射分布图。该方法为之后的科学研究提供了更详细的信息。 In order to obtain finer information about the distribution of background radiance, a method of measuring the full sky background spectral radiation based on fiber spectrometer and two-dimensional turntable is proposed. Can achieve fixed-point observation and full sky scanning two working methods. Described in detail the measurement principle, the composition of the system, calibration principle and method. After a full sky scan, 649 spectral radiance samples were obtained, each with a spectral resolution of 0.5 nm. The measured position of each sample is taken as the pixel point, and the radiance value of each wavelength band at the corresponding position is taken as the gray value to obtain the full sky background spectral radiation distribution map of each wavelength band. This method provides more detailed information for later scientific research.