Lunisolar resonances shape the dynamics in the MEO region and have the effect of increasing an object’s eccentricity possibly up to a value so high that the orbit’s perigee reaches the atmosphere and friction determines the re-entry. The focus of this paper is the eccentricity growth phenomenon observed for navigation satellites. In particular, starting from a secular Hamiltonian model, analytical estimates for the maximum eccentricity reachable along an inclination-only dependent lunisolar resonance are derived as a function of the initial inclination. Also, trajectories that minimize an object’s lifetime are studied, and analytical estimates for such a minimum lifetime are provided as a function of the initial eccentricity of the object. In addition, lifetime cartography maps are presented in the plane of the argument of perigee and the longitude of the ascending node.

中文翻译：

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MEO导航卫星的偏心率增长现象


日月共振塑造了 MEO 区域的动力学，并具有增加物体偏心率的效果，可能达到一个很高的值，以致轨道的近地点到达大气层，摩擦力决定了重返大气层。本文的重点是观测到的导航卫星的偏心率增长现象。特别是，从长期哈密顿模型开始，沿着仅依赖倾角的日月共振可达到的最大偏心率的分析估计是作为初始倾角的函数导出的。此外，还研究了最小化物体寿命的轨迹，并提供了这种最小寿命的分析估计作为物体初始偏心率的函数。此外，寿命制图图呈现在近地点幅角和升交点经度的平面上。