A statistical result of 15 days attitude data gap is presented.The varety character of attitude data is analysed, and put forward that the change of attitude quaternion is periodic.

• 对不连续的15天的姿态数据的间断情况做了统计，并且对姿态数据的日变化性质做了分析，提出了姿态数据变化呈周期性曲线变化的特点。