建模竞赛D题“军事行动避空侦察的时机和路线选择”来源于国家反卫星侦察的军事背景,其核心是要找出卫星的运行规律并建立相关预测模型,体现了全国研究生数学建模竞赛的特色.阐述了命题背景,分析了本赛题的建模及求解思路.通过赛题的研究,使得研究生们更加关心国防建设,引导学生把数学建模应用到军事领域建模中来,解决实际问题. Modeling Contest D “the timing and route selection of military operations to avoid detection of air” comes from the military background of national anti-satellite surveillance, the core of which is to find out the operating rules of the satellite and establish the relevant prediction models, which reflect the national postgraduate mathematics The characteristics of the modeling contest are elaborated.The proposition background is expounded and the modeling and solving ideas of the competition are analyzed.Through the study of the competitions, the graduate students are more concerned about the national defense construction and guide the students to apply the mathematical modeling to the modeling of the military field Come, solve practical problems.