1. Lunar Descent Slide Suggestions & Questions
John Aitchison
March 26th, 2009
[John Aitchison] [Mission Ops]

2. [John Aitchison] [Mission Ops]
100g Descent
Action
Time (s)
Thrust (N)
Radial Burn
1150
Rotation
115
Vertical Burn
Coast Landing
131
More detailed action list? Depict points where “Action” changes? 3-D/Landing Site?
[John Aitchison] [Mission Ops]

3. [John Aitchison] [Mission Ops]
3-D
3 or 4 slides: 3-D overview, 2-D descent trajectory, hop/hover trajectory slide, final slide depicting overview of lander structure and masses on the lunar surface
[John Aitchison] [Mission Ops]

4. [John Aitchison] [Mission Ops]
10kg Descent Trajectory
Action
Time (s)
Thrust (N)
Radial Burn
1650
Rotation
165
Vertical Burn
Coast Landing
196
[John Aitchison] [Mission Ops]

5. Arbitrary Descent Trajectory
Action
Time (s)
Thrust (N)
Radial Burn
34500
Rotation
3450
Vertical Burn
Coast Landing
188.8 – 193.1
3890
[John Aitchison] [Mission Ops]

6. [John Aitchison] [Mission Ops]
Backup Slides
[John Aitchison] [Mission Ops] 6

7. [John Aitchison] [Mission Ops]
100g Descent Propellant
Propellant
Mass (kg)
De-Orbit Attitude Propellant Needed
0.36
1150N Burn Propellant Used
70.12
115N "Coast" Propellant Used
0.19
Descent Propellant Used
70.3
Descent Propellant Left
0.2
Attitude Descent Propellant Used
3.15
Attitude Descent Propellant Left
0.06
Contingency Propellant
1.83
Unusable Propellant
2.27
[John Aitchison] [Mission Ops] 7

8. 100g Overview from Integrated Code
Item
Mass (kg)
Propellant Mass in LLO
78.16
Inert Mass in LLO
78.59
Mass in LLO
156.76
Mass on Lunar Surface
82.95
[John Aitchison] [Mission Ops] 8

9. [John Aitchison] [Mission Ops]
10 kg Descent Propellant
Propellant
Mass (kg)
De-Orbit Attitude Propellant Needed
0.5
1650N Burn Propellant Used
101.71
165N "Coast" Propellant Used
0.31
Descent Propellant Used
102.02
Descent Propellant Left
0.28
Attitude Descent Propellant Used
4.57
Attitude Descent Propellant Left
0.06
Contingency Propellant
1.58
Unusable Propellant
3.52
[John Aitchison] [Mission Ops] 9

10. 10kg Overview from Integrated Code
Item
Mass (kg)
Propellant Mass in LLO
121.22
Inert Mass in LLO
106.63
Mass in LLO
227.85
Mass on Lunar Surface (before hop)
120.76
Mass on Lunar Surface (after hop)
112.13
[John Aitchison] [Mission Ops]

11. Arbitrary Descent Propellant
Mass (kg)
De-Orbit Attitude Propellant Needed
9.46
34500N Burn Propellant Used
3450N "Coast" Propellant Used
5.42
Descent Propellant Used
Descent Propellant Left
0.49
Attitude Descent Propellant Used
90.76
Attitude Descent Propellant Left
0.54
Contingency Propellant
10.99
Unusable Propellant
66.34
[John Aitchison] [Mission Ops]

12. Arbitrary Overview from Integrated Code
Item
Mass (kg)
Propellant Mass in LLO
Inert Mass in LLO
Mass in LLO
Mass on Lunar Surface
[John Aitchison] [Mission Ops]