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Astrodynamics

Article Title

Safe rendezvous scenario design for geostationary satellites with collocation constraints

Keywords

geostationary orbit (GEO), rendezvous and docking (RVD), safety performance, satellite collocation

Abstract

Rendezvous on the geostationary orbit (GEO) is much more complex than that on the lowearth orbit and has a higher critical requirement for safety performance. This paper presentsa safe scenario design method for GEO rendezvous proximity missions where the safetyconstraint of a collocated satellite is considered. A recently proposed quantitative indexconsidering trajectory uncertainty is introduced to analyze the safety performance of thescenario parameters including the V-bar keeping positions and the fly-by trajectory radius.Furthermore, an exhaustive analysis is performed to find the dangerous regions of the V-barkeeping positions and the appropriate semi-major axis of the fly-by ellipse, considering thesafety requirements of both the target and the collocated satellite. A geometry methodis then developed for designing a feasible and suboptimal safe rendezvous scenario. Themethod is tested by designing four rendezvous scenarios with ±V-bar approach directionsrespectively in the situations with and without one collocated satellite. Safety performanceand velocity increments of the scenarios are compared and a conclusion is reached that thecollocated satellite has a significant influence on the scenario design.

Publisher

Tsinghua University Press

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