[Kara Akgulian] [Mission Ops]

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Presentation transcript:

[Kara Akgulian] [Mission Ops] Lunar Orbit Circularization Toy Ball Materials Lunar Access with Ground Tracking February 26, 2009 [Kara Akgulian] [Mission Ops]

[Kara Akgulian] [Mission Ops] Impulse Thrust Solid Only Boost of: 10m/s, 25m/s, 50m/s, 100m/s, 200m/s Split Between: 1st Orbit, 1st and 2nd Orbits and 1st, 2nd and 3rd Orbits 3 Orbits: 1.) rp=1837.4 km ra=50000 km 2.) rp= 2737.4 km ra=525000 km 3.)rp= 2737.4 km ra=55000 km rp Δv Boost (km/s) mprop (kg)/Boost Launch Cost ($)/Boost Total Δv (km/s) mprop (kg) Total Launch Cost ($) Total Total TOF (Days) 1837.4 0.01 2.19 9,400 0.63 154.85 665,000.00 56.51 0.03 5.49 24,000 153.48 659,000.00 23.09 0.05 11.03 47,000 0.6 146.64 629,000.00 12.27 0.1 22.27 96,000 7.4 0.2 45.36 195,000 5.36 2737.4 0.5 119.92 515,000.00 67.31 27.42 14.51 8.54 0.4 94.16 404,000.00 5.83 3737.4 0.42 99.24 426,000.00 77.23 404,100.00 31 16.31 9.47 6.57 Chart shows only boost in first orbit Δv without boost is 0.38 m/s Isp= 280 s Mass of OTV=600 kg Launch Cost/kg=$4292 Cost’s are additional TOF= Time of Flight [Kara Akgulian] [Mission Ops]

[Kara Akgulian] [Mission Ops] Continuous Burn Electric Propulsion Solid Propulsion Assumptions: Constant Thrust at Optimum Level Working with Energy Equations Optimum Pointing Angle Costs are additional Total Δv (km/s) mprop (kg) Launch Cost ($) TOF(Days) Δv 0.63 21.99 94,000.00 45.45 Δv+25% 0.79 27.61 118,000.00 57.07 Δv-25% 0.48 16.42 70,000.00 33.93 Values Used: EP Isp= 1800 s Solid Isp= 280 s Mass of OTV=600 kg Launch Cost/kg=$4292 EP Mass Flow Rate=5.6x10-6 kg/s Solid mass Flow Rate=1.8 kg/s Total Δv (km/s) mprop (kg) Launch Cost ($) TOF(Min) Δv 0.63 156.22 670,000.00 1.45 Δv+25% 0.79 201.26 864,000.00 1.86 Δv-25% 0.48 113.72 488,000.72 1.05 [Kara Akgulian] [Mission Ops]

[Kara Akgulian] [Mission Ops] Backup Slides Δv split between the first two orbits rp Δv Boost (km/s) mprop (kg)/Boost Launch Cost ($)/Boost Total Δv (km/s) mprop (kg) Total Launch Cost ($) Total Total TOF (Days) 1837.4 0.01 1.09 5,000 0.64 156.23 671,000.00 112.8 0.03 2.74 12,000 0.63 153.48 659,000.00 45.26 0.05 5.49 24,000 23.09 0.1 11.03 47,000 0.6 146.64 629,000.00 12.27 0.2 22.27 96,000 7.4 2737.4 4,700 0.51 121.24 520,000.00 134.56 0.5 119.92 515,000.00 53.96 27.42 14.51 8.54 3737.4 4,600 0.42 99.24 426,000.00 154.1 0.41 97.33 418,000.00 61.6 0.4 94.16 404,000.00 31 16.31 9.47 [Kara Akgulian] [Mission Ops]

[Kara Akgulian] [Mission Ops] Δv split between the first three orbits rp Δv Boost (km/s) mprop (kg)/Boost Launch Cost ($)/Boost Total Δv (km/s) mprop (kg) Total Launch Cost ($) Total Total TOF (Days) 1837.4 0.01 0.73 3,000 0.63 155.77 669,000.00 169.01 0.03 1.82 7,800 67.79 0.05 3.66 16,000 34.21 0.1 7.33 31,000 17.7 0.2 14.76 63,000 0.6 146.64 629,000.00 9.76 2737.4 0.51 121.68 522,000.00 201.88 0.5 119.92 515,000.00 80.69 40.65 20.9 0.47 111.23 477,000.00 11.28 3737.4 3,100 0.42 99.24 426,000.00 231.04 98.39 422,000.00 92.4 46.5 0.4 94.16 404,000.00 23.58 12.8 [Kara Akgulian] [Mission Ops]