Europa Orbiter tour design with Io gravity assists
Europa Orbiter tour design with Io gravity assists
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DOI：
10.1016/j.actaastro.2010.08.041
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发表时间：
2011-04
影响因子：
3.5
通讯作者：
Kevin W. Kloster;A. Petropoulos;J. Longuski
中科院分区：
文献类型：
--
作者：
Kevin W. Kloster;A. Petropoulos;J. Longuski
对于欧罗巴轨道飞行器任务，设计包括木卫一飞越在内的木星系统游览的策略与为之前版本的任务开发的方案有很大不同。假设进入木星的双曲线的最近接近距离低于木卫一的轨道，则木卫一重力辅助会提供最大的能量抽空，从而使近木星半径的减小最小。与木卫三辅助捕获相比，使用艾奥来帮助捕获航天器可以增加木星轨道插入 ΔV 的节省。游览设计以 Tisserand 图表为指导，叠加简单而准确的辐射模型，以便包括木卫一飞越在内的游览可以保持可接受的辐射剂量。虽然木卫一飞越增加了最终前往木卫二的旅行时间，但它们提供了 ΔV 节省和更大的科学回报，包括飞越木卫一火山之一的羽流的可能性。
For a Europa Orbiter mission, the strategy for designing Jovian System tours that include Io flybys differs significantly from schemes developed for previous versions of the mission. Assuming that the closest approach distance of the incoming hyperbola at Jupiter is below the orbit of Io, then an Io gravity assist gives the greatest energy pump-down for the least decrease in perijove radius. Using Io to help capture the spacecraft can increase the savings in Jupiter orbit insertion ΔV over a Ganymede-aided capture. The tour design is guided by Tisserand graphs overlaid with a simple and accurate radiation model so that tours including Io flybys can maintain an acceptable radiation dosage. While Io flybys increase the duration of tours that are ultimately bound for Europa, they offer ΔV savings and greater scientific return, including the possibility of flying through the plume of one of Io's volcanoes.