Risk modeling and analysis methodologies for reentry and conjunction of space objects우주물체의 재진입 및 충돌 위험 모델링과 분석 방법론

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dc.contributor.advisorAhn, Jaemyung-
dc.contributor.authorKim, Siwoo-
dc.description학위논문(박사) - 한국과학기술원 : 항공우주공학과, 2023.2,[iv, 73 p. :]-
dc.description.abstractThe recent growth of the space industry and the resulting increase in the number of space objects in the Earth orbit are leading to a direct increase in space risk, including reentry and conjunction. The risk posed by space objects directly or indirectly damages the public as well as satellite operators but is still an unfamiliar concept compared to other disasters. In order to expand awareness and effective communication, a study on risk evaluation methodology that considers the systemic risk characteristics of space object risk in needed. This thesis proposes a systematic analysis procedure and risk assessment methodology for analyzing the risk of reentry and conjunction of space objects. The proposed procedure for reentry assessment comprises three phases encompassing the whole reentry stages of space objects. Mathematical models for assessing the impact risk of reentering space objects by utilizing the information available during different risk management phases and the recommended risk analysis results for effective communication are presented. The concept of the conditional casualty expectation is proposed as the metric representing the reentry risk, and the method to compute its profile is introduced. A case study on the risk management procedure with the dataset on an actual reentry event is conducted to demonstrate the efficacy of the proposed procedure. A single index for collision risk that comprehensively considers the geometry between objects, the uncertainty of information and the sustainability of the outer space environment is proposed. The methodologies for modeling and evaluating the contamination of the orbital environment by debris from the collision were analyzed, and case studies on the low Earth orbit objects were conducted.-
dc.subjectSpace situational awareness (SSA)▼aReentry risk assessment▼aConditional expected casualty▼aCollision risk assessment▼aSingle collision risk index▼aSpace object environment modeling-
dc.subject우주 상황 인식▼a재진입 위험 분석▼a조건부 예상 사상자수▼a충돌 위험 분석▼a단일 충돌 위험 지수▼a우주 물체 환경 모델링-
dc.titleRisk modeling and analysis methodologies for reentry and conjunction of space objects-
dc.title.alternative우주물체의 재진입 및 충돌 위험 모델링과 분석 방법론-
dc.description.department한국과학기술원 :항공우주공학과,-
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