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Lunar Descent Analysis

Lunar Descent Analysis. January 29, 2009. LLO (Low Lunar Orbit) Analysis. ∆V add-on 150 m/s for increase from 100 km to 500 km orbit Optimize with LLO insertion ∆V to minimize total ∆V. Altitude of LLO important in minimizing ∆V and in ensuring stable orbit. Airbag vs. Soft L anding

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Lunar Descent Analysis

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  1. Lunar Descent Analysis January 29, 2009 [Alex Whiteman] [Mission Ops]

  2. LLO (Low Lunar Orbit) Analysis • ∆V add-on 150 m/s for increase from 100 km to 500 km orbit • Optimizewith LLO insertion ∆V to minimize total ∆V [Name] [Group] Altitude of LLO important in minimizing ∆V and in ensuring stable orbit

  3. Airbag vs. Soft Landing • 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]

  4. ∆V Add-on Code [Name] [Group]

  5. Initial Basis for Descent Trajectory Reference: “Apollo Lunar Descent and Ascent Trajectories”, NASA, 1970 [Name] [Group]

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