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Lunar Descent Analysis
January 29, 2009 [Alex Whiteman] [Mission Ops]
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LLO (Low Lunar Orbit) Analysis
Altitude of LLO important in minimizing ∆V and in ensuring stable orbit ∆V add-on 150 m/s for increase from 100 km to 500 km orbit Optimize with LLO insertion ∆V to minimize total ∆V [Name] [Group]
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Airbag vs. Soft Landing Future Work
10-20 m/s ∆V savings in previous missions (Luna 9, Pathfinder, Spirit, Opportunity) Could save more ∆V if final weight of Lander remains relatively small Future Work Begin Lunar descent trajectory optimization for minimum fuel expenditure [Name] [Group]
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∆V Add-on Code [Name] [Group]
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Initial Basis for Descent Trajectory
Reference: “Apollo Lunar Descent and Ascent Trajectories”, NASA, 1970 [Name] [Group]
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