Pegasus MSFSatElysiumLaunch Readiness Review

Jordan Burns, Brenden Hogan, Miranda Link, Cody Spiker, Chris Dehoyos, Hemal SemwalNovember 1st, 2011

Mission OverviewMission Statement:

• “To test the effects of high altitude flight upon a closed container containing Streptococcus mutans bacterium, and recording their response to discover if harsh high altitude effects bacterial reproduction and survival.”

Why?• To test the validity the of the recorded results of the 1967 flight of

Surveyor III.

Design Overview• 21x21x12 cm• 2 levels• 6 different samples, 3

locations with varying conditions

• Motorized door• 4 sensors (2)

• Temperature• Pressure• Visible Light

Hardware/Software Testing• Software / Hardware Testing

• No major problems occurred with our software, besides getting everything to run right.

• FIX: • Trial and Error testing and corrections

• Cooler Test• Data collected from all sensors-compared to control data• EXCEPT HOBO

• Malfunction: only programmed to output voltage readings, not temperature and humidity

Time 300 660 1020 1380 1740 2100 2460 2820 3180 3540 3900 4260 4620 4980 5340 5700 6060 6420 6780 7140 75000

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120Cooler Test- Light vs. Time

Light

Box jolted

Box jolted

Open Door

Close Door

Average: 13

No Light: 0Absolute Light: 1024

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Cooler Test- Temperature(inside) vs. Time

Temp_in(electronics)

Close Door

Open Door

Average: 33.5 degrees Celsius

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Cooler Test- Temperature(door section) vs. Time

Temp_out(motor compartment)

Open Door

Close Door

Average: 25.3 degrees Celsius

Cooler Testing

Time 300 660 1020 1380 1740 2100 2460 2820 3180 3540 3900 4260 4620 4980 5340 5700 6060 6420 6780 7140 750083400

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83800

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84000

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Cooler Test- Pressure vs. Time

PressureOpen DoorClose Door

Average: 83788.67 Pascals

Cooler Testing

Incubation Testing • Each test has been overlapped in order

to isolate each potential problem that may occur.

• Multiple tests show the desired traits from a healthy culture are:• Translucent, White Colonies• Expansion Growth • Colony size larger than 1 mm

• After analysis of S. mutans, it was discovered that this strand is non-aerobic and a vacuum test would be inconclusive towards any results.

This is the Desired Culture

Flight Samples-To be tested• The actual flight cultures are going to be one day shy of full

maturity.

• This means that the actual cultures for flight will be grown on the Thursday before launch day, November 4, 2011.

• Being slightly immature, these cultures will be at their most vulnerable point of outside factors affecting their growth.

• Being exposed at this point means that after flight and exposure, any change in the bacteria will be the most noticeable.

Structural Testing• Drop/ Roll Test

• Our drop test revealed that our structure was NOT SOUND• The slits for our shelves were too deep• Our tape was not secure

• FIX: • Pre-cut BASES to slide the shelves in• Cleaner and more precise cuts were made, and

more efficient gluing.• Whip Test

• revealed that the solid faces of our structure could not support the pulling of the tether.

• FIX:• A wall that runs across the middle of the

CubeSat to give the wall support

Expected Results

• We expect to find that the bacteria will be resilient enough to survive both the extreme radiation and temperature environments.

• The samples will grow normally after the flight

Worries

1. Science Failure: The motorized door will not open. No light radiation will be let into satellite environment.

2. Structural Failure: The motorized door will rip off during burst

Requirements MatrixRequirements Description Origin

A Construct a BalloonSat that shall survive an ascent to 30 km above the surface of Earth and the following decent while maintaining complete functionality.

Mission

Statement

B Weight shall not exceed 850 grams, nor a budget of $370 ($250 + $20/ea out of pocket).

C SatElysium shall safely transport 6 samples of streptococcus mutans during its flight, to later study the effects of temperature and radiation in the stratosphere on the bacteria.

D Streptococcus mutans samples shall be recovered and analyzed post-flight.

E SatElysium shall carry a camera payload to document footage of the flight of the exterior of the satellite.