1. AAE450 Spring 2009 Descent Trajectory Hover Trajectory LD Code Integration John Aitchison March 5 th, 2009 [John Aitchison] [Mission Ops]

2. AAE450 Spring 2009 [John Aitchison] [Mission Ops]  Finalized Descent Trajectory {all payloads} –De-Circularize → Retro→Throttle Down Coast→Vertical –Steering program a possibility Does provide savings if we need to start descent at altitudes approximately >25km Dependent on TLI/LD iterations  LD Code Integration {all payloads} –Complete, will be finalized with updated code from each group  Hover Trajectory {arbitrary payload} –Near complete, small attitude control adjustments needed 2

3. AAE450 Spring 2009 [John Aitchison] [Mission Ops]  Arbitrary Payload Analysis –Falcon 9 LLO Deliverable: ~5700kg –Falcon 9 H LLO Deliverable: ~18000kg  Mass Deliverable to Lunar Surface –LD Budget available for Structure, Power, Thermal, Comm, Attitude Inert, Usable Payload –Assuming descent engine thrust & attitude thrust scale accordingly Mass in LLODE ThrustPropellantInert PropLD Budget 5,700 kg44,000 N2,825 kg342 kg2,532 kg 18,000 kg143,950 N8,722 kg998 kg8,280 kg 3

4. AAE450 Spring 2009 Backup Slide Content [John Aitchison] [Mission Ops]  LD Code Integration –Sample Output (pg. 5) –Flow (pg. 6) –Code (pg. 10-26)  Hover Trajectory (pg. 7-8)  Descent Trajectory (pg. 9)  Steering Program Code (pg. 27-28)  Circ-Elliptical Using Attitude Thrusters (pg. 29-31) 4

5. AAE450 Spring 2009 Sample LD Integration Output [John Aitchison] [Mission Ops] 5

6. AAE450 Spring 2009 LD Code Integration Flow [John Aitchison] [Mission Ops] 6  Mass Inputs –Power, Communications, Attitude Inert, Payload/Locomotion  Iterates –Hop/Hover Trajectory, Prop System Inert Mass, Structural “Frame” Inert Mass, Attitude Prop Mass  Outputs –All final masses in LLO

7. AAE450 Spring 2009 Hover Trajectory [John Aitchison] [Mission Ops] 7

8. AAE450 Spring 2009 Hover Trajectory Code [John Aitchison] [Mission Ops] 8

9. AAE450 Spring 2009 Descent Trajectory [John Aitchison] [Mission Ops] 9

10. AAE450 Spring 2009 [John Aitchison] [Mission Ops] LD Integrated Code (pg. 1) 10

11. AAE450 Spring 2009 [John Aitchison] [Mission Ops] LD Integrated Code (pg. 2) 11

12. AAE450 Spring 2009 [John Aitchison] [Mission Ops] LD Integrated Code (pg. 3) 12

13. AAE450 Spring 2009 [John Aitchison] [Mission Ops] LD Integrated Code (pg. 4) 13

14. AAE450 Spring 2009 [John Aitchison] [Mission Ops] LD Integrated Code (pg. 5) 14

15. AAE450 Spring 2009 [John Aitchison] [Mission Ops] LD Integrated Code (pg. 6) 15

16. AAE450 Spring 2009 [John Aitchison] [Mission Ops] LD Integrated Code (pg. 7) 16

17. AAE450 Spring 2009 [John Aitchison] [Mission Ops] LD Integrated Code (pg. 8) 17

18. AAE450 Spring 2009 [John Aitchison] [Mission Ops] LD Integrated Code (pg. 9) 18

19. AAE450 Spring 2009 [John Aitchison] [Mission Ops] LD Integrated Code (pg. 10) 19

20. AAE450 Spring 2009 [John Aitchison] [Mission Ops] LD Integrated Code (pg. 11) 20

21. AAE450 Spring 2009 [John Aitchison] [Mission Ops] LD Integrated Code (pg. 12) 21

22. AAE450 Spring 2009 [John Aitchison] [Mission Ops] LD Integrated Code (pg. 13) 22

23. AAE450 Spring 2009 [John Aitchison] [Mission Ops] LD Integrated Code (pg. 14) 23

24. AAE450 Spring 2009 [John Aitchison] [Mission Ops] LD Integrated Code (pg. 15) 24

25. AAE450 Spring 2009 [John Aitchison] [Mission Ops] LD Integrated Code (pg. 16) 25

26. AAE450 Spring 2009 [John Aitchison] [Mission Ops] LD Integrated Code (pg. 17) 26

27. AAE450 Spring 2009 [John Aitchison] [Mission Ops] Steering Program Code 27

28. AAE450 Spring 2009 Steering Program Code (cont.) [John Aitchison] [Mission Ops] 28

29. AAE450 Spring 2009 Circ-Elliptical Using Attitude Thrusters [John Aitchison] [Mission Ops] 29

30. AAE450 Spring 2009 Circ-Elliptical Using Attitude Thrusters (pg.2) [John Aitchison] [Mission Ops] 30

31. AAE450 Spring 2009 Circ-Elliptical Using Attitude Thrusters (pg.3) [John Aitchison] [Mission Ops] DeltaV = 9.2 m/s Attitude Propellant Mass =.82 kg 31