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2008-11-21 Mission Analysis STK 8.0 Analysis and Impact Accuracy Stephen Lee

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Presentation Outline Derived Requirements Descent Manoeuvre Case 1 Descent Manoeuvre Case 2 Sensitivity Study Target Crater Selection Future Work 2008-11-21 2 Stephen Lee

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Derived Requirements The Penetrator Shall: Begin manoeuvre at circular orbit of 100 km from lunar surface Impact the surface with velocity of 300-345 [TBC] m/s Impact the surface within +/- 10-25 [TBC] km of target impact zone Impact the surface at an angle of less than +/- 30° [TBC] from perpendicular 2008-11-21Stephen Lee 3

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Descent Manoeuvre Case 1 2008-11-21 4 Stephen Lee t = 13 min 46 s Δ v = 1.88 km/s m fuel = 10.5 kg Descent 1.1° v impact =300 m/s Engine Data: I SP = 285 s T = 45 N 100 km 28 km Selene-1 Orbit Δ t= 11 min Manoeuvre

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Descent Manoeuvre Case 2 2008-11-21 5 Stephen Lee t = 8 min 30 s Δ v = 1.75 km/s m fuel = 9 kg Burn 1 Burn 2 100 km Selene-1 Orbit Descent 2 7.3 ° Descent 1 Δ t= 4 s Δ t= 2 s v impact =300 m/s 28 km Engine Data: I SP = 285 s T = 4500 N

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Case 1 Sensitivity Study 2008-11-21 6 Stephen Lee

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Case 2 Sensitivity Study 2008-11-21 7 Stephen Lee

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Case 2 Sensitivity Study 2008-11-21 8 Stephen Lee

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Target Crater Selection 2008-11-21 9 Stephen Lee NameDiameter [km] Depth [km] Latitude [°] Longitude [°] Scientific Interest De Gerlache (A)32.4Unknown88.587.1High Shackleton (B)192.089.90.0High Shoemaker (C)50.9Unknown88.144.9Medium Faustini (D)39Unknown87.377.0High A B C D

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Future Work Perform trade study to select nominal case Perform Monte Carlo analysis on nominal case Select final impact site Determine separation method from Selene-1 2008-11-21 10 Stephen Lee

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2008-11-21 Questions?

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