1. Attitude, Lunar Transfer Phase
Final Slide Proposal
Brittany Waletzko
100g PL Integration
Attitude, Lunar Transfer Phase
Week 13—4/9/09

2. Systems Overview Large Payload 10kg Payload 100g Payload System Masses
Injected Mass to Low Earth Orbit (kg)
436
584
9953
Injected Mass to Low Lunar Orbit (kg)
156
228
4545
Mass on Lunar Surface (kg) 79
107
2325
Payload Delivered to Lunar Surface
10kg
1743kg
Large Payload
10kg Payload
Too busy?
100g Payload
<1>

3. Mission Timelines (Backup)
100g Payload Mission Timeline
10kg Payload Mission Timeline
Elapsed Time (ddd:hh:mm)
Event
Vehicle
-365:00:00
Launch
Launch Vehicle/OTV
000:00:00
Arrive in LLO
OTV
000:00:03
In lower orbit
Lander
000:00:04
Rotate and Land
Systems check
Space Ball
000:00:05
Deployment from Lander
000:00:06
Orientation
Travel 500m
000:00:14
Braking maneuver, dust removal
000:00:15
Take picture of Lander, Begin transmission to Lander
000:00:23
End photo transmission
Transmit arrival Mooncast (near real-time video, photos, HD video, XPF set asides, data uplink set) to Earth
001:33:56
Transmit Mission Complete Mooncast (near real time video, photos, HD video)
002:08:04
Finished transmitting, prepare for night
009:00:00
Standby for lunar night
025:00:00
Power up after night
026:00:00
Transmit telemetry and photo
026:00:14
Mission Complete
Elapsed Time
(ddd:hh:mm)
Event
-365:00:00
Launch
0:00:00
Lunar Lander reaches LLO and separates from OTV
0:00:04
Lands on lunar surface and starts video taping
0:00:12
Finishes taping and begins transmission of video
0:03:44
Completes video transmission and takes panoramic pictures
0:03:45
Finishes panoramic pictures and begins transmission of pictures
0:03:59
Completes picture transmission and begins hop for locomotion
0:04:01
Locomotion phase complete and begins HD video taping
0:12:01
Begins transmission of HD video and takes panoramic pictures
2:06:24
Ends transmission of HD video and begins transmission of pictures
2:06:36
Ends transmission of pictures and shuts down for lunar night
15:23:24
Turns on and sends signal after lunar night.
Too long? Prolly backup
Elapsed Time given in days, hours, and minutes
100g and 10kg Payload
<2>

4. Mission Timelines—cont. (Backup)
Large Payload Mission Timeline
Elapsed Time (ddd:hh:mm)
Event
-365:00:00
Launch
000:00:00
Arrive in Low Lunar Orbit
Transfer to Lunar Descent Transfer Orbit
Begin Final Lunar Descent burn
Come to rest 100 m above surface/begin hover locomotion
Touch down on lunar surface
Large Payload
Prolly backup
Elapsed Time given in days, hours, and minutes
<3>

5. Trajectory Correction (backup)
100g Payload Correction Maneuver Configuration
Parameter
Value
Isp (s)
1952
mo (kg)
436.0
Propellant for Correction (kg)
1.1
Thrust per Engine (mN) 75
Time for ΔV (hr)
80.7
Large Payload Correction Maneuver Configuration
Parameter
Value
Isp (s)
2250
mo (kg)
9953
Propellant for Correction (kg)
22.5
Thrust per Engine (mN)
(x4 engines)
424
Time for ΔV (hr)
54.2
10kg Payload Correction Maneuver Configuration
Parameter
Value
Isp (s)
1964
mo (kg)
585.6
Propellant for Correction (kg)
1.5
Thrust per Engine (mN) 75
Time for ΔV (hr)
92.6
Most Likely Backup
T = instantaneous thrust (assumed constant over interval)
m = instantaneous mass (assumed constant over interval)
<4>