开展了白天全天空背景亮度特性研究.进行天空背景全天候测量，开展了测量数据的分析与处理；提出了基于MORTRAN软件的修正完善方法，建立了全天空背景亮度数据；利用该数据进行了应用分析.分析结果表明：该方法完善的天空背景亮度数据满足应用需求，且应用结果与实际情况基本吻合.

The research on characteristic of the all-sky background brightness on day is developed. The sky background brightness is measured, the measurement data is analyzed. Based on the MORTRAN software, a corrected method to consummate the all-sky background brightness is given. The consummated all-sky background brightness data is applied to analyze detecting process, the applying result inosculates to the practicality situation which indicates that the consummated method can satisfy the requirement for application.