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Critical Conjunction Detection and Mitigation

Aida, Saika and Kirschner, Michael (2015) Critical Conjunction Detection and Mitigation. 25th International Symposium on Space Flight Dynamics, 19.-23. Oct. 2015, Munich.

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Criteria for the critical conjunction are discussed. In the current collision avoidance operation, the collision probability is a key parameter for the criticality assessment of the detected conjunction to decide an avoidance maneuver. The conventional probability threshold of ~10-4 has been applied for LEO conjunctions at the German Space Operations Center. However, not all conjunctions can be decided only by this criterion due to the large variation of the orbit uncertainties estimated for the numerous space objects. To evaluate the effect of this characteristic, the collision probability and the avoided risk for the probability threshold were formulated using the standard deviations related to the covariance ellipse projected onto the B-plane, which is perpendicular to the relative velocity. The encountering objects of the past conjunctions were also categorized by the same parameter. The avoidable conjunction was then evaluated in terms of the operational aspects. Finally, the collision risk as a result of the collision avoidance operation was assessed.

Item URL in elib:https://elib.dlr.de/103585/
Document Type:Conference or Workshop Item (Poster)
Title:Critical Conjunction Detection and Mitigation
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:Collision probability, Avoided risk, Standard deviation
Event Title:25th International Symposium on Space Flight Dynamics
Event Location:Munich
Event Type:international Conference
Event Dates:19.-23. Oct. 2015
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space System Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Space System Technology
DLR - Research theme (Project):R - Project Space Debris (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Space Operations and Astronaut Training > Space Flight Technology
Deposited By: Aida, Saika
Deposited On:30 Mar 2016 09:11
Last Modified:31 Jul 2019 20:00

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