小行星撞击事件频发,是人类共同面对的重大潜在威胁。基于监测预警数据研判撞击风险,制定适用于不同撞击风险场景的行动准则和在轨处置阈值,对近地小行星撞击威胁应对具有决定性指导作用。本文介绍了SMPAG推荐的应对行动准则和NASA给出的最新应对基准。综合考虑撞击概率、撞击灾害、在轨处置可行性、任务实施成本等,提出了新的应对行动基准建议。可为近地小行星撞击威胁应对行动提供参考。
In history,NEA impact on the Earth has occurred frequently,threatening all human beings in the long term.Based on the monitoring and warning data and the impact risk assessment,it is of decisive guidance to develop the principle of response action and the active defense threshold for the different NEA impact risk scenarios.This article introduces the response action criteria and the active defense threshold recommended by SMPAG,and also NASA's latest response benchmark.Comprehensively considering the existing recommendations,the impact probability,impact disaster,active defense feasibility,mission implementation cost and benefit,we recommend new response action criteria and the active defense threshold.It can provide reference for the response to the NEA impact threat.
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