Landing Site Weak Stability Boundary Transfer (WSB)

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Presentation transcript:

Landing Site Weak Stability Boundary Transfer (WSB) January 29, 2009 [Kara Akgulian] [Mission Ops] [Locomotion] 1

[Kara Akgulian] [Mission Ops] Lunar Landing Site Mare Cognitum 3°S 22°W; ~5km between Surveyor 2, Apollo 12 and Apollo 17 Mare Fecunditatis 1°S 55°E; ~5km to Luna 16 Mare Insularum 2°N 26°W; ~5km to Apollo 16 Mare Tranquilitatis 2°N 25°E; ~5-10km between Ranger 8, Surveyor 5, Apollo 11 [Kara Akgulian] [Mission Ops] [Locomotion]

WSB Analysis Background Theoretically 25% ∆V savings when compared Apogee Background Uses the lunar and solar gravity to reduce total ∆V Theoretically 25% ∆V savings when compared to a Hohmann Transfer Transfer time 80-100 days Concerns Not many missions Not a lot of physics background, mostly theoretical Figure based on E.A. Belbruno Ref 1 [Kara Akgulian] [Mission Ops] [Locomotion] 3

[Kara Akgulian] [Mission Ops] [Locomotion] 4

[Kara Akgulian] [Mission Ops] [Locomotion] 30oW 20oW 20oE 30oE 10oN 0o 0o 10oS http://science.nasa.gov 50oE 60oE 10oW 0o [Kara Akgulian] [Mission Ops] [Locomotion]

[Kara Akgulian] [Mission Ops] [Locomotion] References E.A. Belbruno, J. Carrico, “Calculation of Weak Stability Boundary Ballistic Lunar Transfer Trajectories” AIAA/AAS Astrodynamics Specialist Conference, Denver, Colorado, AIAA Paper NO.2000-4142, (August 2000) C. Circi, P. Teofilatto, “On the Dynamics of Weak Stability Boundary Lunar Transfers” pp 41-72 Topography by http://planetarynames.wr.usgs.gov by NASA and Astrogeology Research Program List of Mare by http://lunar.arc.nasa.gov/science/atlas/mare/mare.htm by NASA [Kara Akgulian] [Mission Ops] [Locomotion]