卫星星座的临界规模
Critical Sizes of Satellite Constellations
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中文总结 AI 辅助
本文通过分析方法发现，多个已规划或部署的卫星星座超过临界规模，会产生失控轨道碎片，即便采取高标准减缓措施也存在风险，呼吁加强监管并审慎评估星座计划。
中文摘要 AI 辅助
商业航天活动的迅猛增长（主要源于卫星星座的发展）可能导致轨道碎片数量失控。各国监管机构正试图通过轨道碎片减缓要求来限制这些风险，但这些要求未解决卫星星座的大规模和长寿命问题。目前的评估基于单个卫星的风险，忽略了星座的总体风险，部分原因是缺乏合适的星座计划评估方法。本文采用一种简单的分析方法发现，多个已规划、部分部署或完全部署的星座超过了其临界规模，会产生不稳定或失控的轨道碎片种群。令人担忧的是，即使这些星座采用了超出国际公认良好实践的碎片减缓措施，且部署在原始、无碎片的轨道环境中，无论星座规模大小，都会出现这种情况。研究结果表明需要更严格的监管方法，并建议审慎考虑一些近期的星座计划。
英文摘要
The precipitous growth of commercial space activity, largely from the development of satellite constellations, threatens to produce a runaway orbital debris population. National regulators are attempting to limit these risks through orbital debris mitigation requirements, but these fail to address the large scale and long lifetimes of satellite constellations. Instead, evaluations are based on the risks from single satellites, and the aggregate risks across constellations are neglected. This situation arises in part because of a lack of suitable approaches to evaluate constellation plans. Here a simple analytical approach reveals that several planned, partially deployed, or fully deployed constellations exceed their critical size producing an unstable or a runaway orbital debris population. Worryingly, this occurs both for small and large constellations, despite debris mitigation measures that go beyond internationally recognised good practices, and even when the constellations are deployed into a pristine, debris-free orbital environment. The results demonstrate the need for more stringent approaches to regulation and suggest careful consideration of some recent constellation plans.
