Team ZephyrLaunch Readiness Review

Joseph Sheehey, Huy Le, Andrew Zizzi, Alex Morrow, Sam Evans, Logan

WrightNovember 11, 2008

Mission Overview

• Ascend to approximately 31,000 meters.

• Take ambient light readings during the entire flight– Using LED Photometer strings– Recorded on HOBOs

• Take photographs for the entire duration of the flight at 15 second intervals.

Design Overview

• 15cm Cube

• Two rows of 5 LEDs on each side– 1 LED of each wavelength on each side and

top– 5cm Baffling tube on each LED

• Camera– Filter allows clear view while minimizing heat

loss

Cold Test 1Cold Test 1 Temperature Readings

-50

-40

-30

-20

-10

0

10

20

30

13:1

5:00

13:1

9:30

13:2

4:00

13:2

8:30

13:3

3:00

13:3

7:30

13:4

2:00

13:4

6:30

13:5

1:00

13:5

5:30

14:0

0:00

14:0

4:30

14:0

9:00

14:1

3:30

14:1

8:00

14:2

2:30

14:2

7:00

14:3

1:30

14:3

6:00

14:4

0:30

14:4

5:00

14:4

9:30

14:5

4:00

14:5

8:30

15:0

3:00

15:0

7:30

15:1

2:00

15:1

6:30

15:2

1:00

15:2

5:30

15:3

0:00

15:3

4:30

15:3

9:00

15:4

3:30

15:4

8:00

15:5

2:30

15:5

7:00

16:0

1:30

16:0

6:00

16:1

0:30

16:1

5:00

16:1

9:30

16:2

4:00

16:2

8:30

16:3

3:00

16:3

7:30

16:4

2:00

16:4

6:30

Time

Tem

per

atu

re (

Cel

siu

s)

Internal Temperature External temperature

Cold Test 2

Cold Test 2 Temperature Readings

-20

-15

-10

-5

0

5

10

15

20

25

30

18:0

5:00

18:0

9:40

18:1

4:20

18:1

9:00

18:2

3:40

18:2

8:20

18:3

3:00

18:3

7:40

18:4

2:20

18:4

7:00

18:5

1:40

18:5

6:20

19:0

1:00

19:0

5:40

19:1

0:20

19:1

5:00

19:1

9:40

19:2

4:20

19:2

9:00

19:3

3:40

19:3

8:20

19:4

3:00

19:4

7:40

19:5

2:20

19:5

7:00

20:0

1:40

20:0

6:20

20:1

1:00

20:1

5:40

20:2

0:20

20:2

5:00

20:2

9:40

20:3

4:20

20:3

9:00

20:4

3:40

20:4

8:20

20:5

3:00

20:5

7:40

21:0

2:20

21:0

7:00

21:1

1:40

21:1

6:20

21:2

1:00

21:2

5:40

21:3

0:20

21:3

5:00

21:3

9:40

21:4

4:20

Time

Tem

per

atu

re (

Cel

siu

s)

Internal Temperature External Temperature

Cold Test Light Intensity Violet

Violet Voltage Readings and Light Intensity Calculations

-0.01

-0.008

-0.006-0.004

-0.002

0

0.002

0.0040.006

0.008

0.01

18:0

5:00

18:1

4:00

18:2

3:00

18:3

2:00

18:4

1:00

18:5

0:00

18:5

9:00

19:0

8:00

19:1

7:00

19:2

6:00

19:3

5:00

19:4

4:00

19:5

3:00

20:0

2:00

20:1

1:00

20:2

0:00

20:2

9:00

20:3

8:00

20:4

7:00

20:5

6:00

21:0

5:00

21:1

4:00

21:2

3:00

21:3

2:00

21:4

1:00

21:5

0:00

21:5

9:00

Time

Voltage Violet Adjusted (V) Violet Power (W) Light Intensity (W/Sq M)

Structural Test Results

• Drop Test – Passed– 8 story drop with mass simulators– BalloonSat received minimal damage

• Whip Test – Passed– String Attachment Tube was undamaged– Internal components were unmoved

• Stair Test – Passed– Survived 20 Stair drop/kick with dented

corners and edges.

Flight Results (Predicted)

• Visible light spectrum will remain the same intensity or decreased with increased altitude.

• IR radiation will increase with increasing altitude.– Water vapor in atmosphere filters out Infrared

radiation from reaching the ground.

• UV radiation will increase with increasing altitude.– The ozone and atmosphere almost completely filter

out UV radiation from reaching the ground.– UV radiation will increase drastically above the Ozone

layer at approximately 24 km.

Biggest Worries

• Cold– First Cold Test Failed– Second Cold Test Passed (4 hours) but did

not get as cold– Camera failing because of cold

RequirementComplies

?Design Specifications to

Comply

Design shall have one additional experiment that collects science data.

Yes

Design includes an LED Photometer based science mission to collect data on the variation in select wavelengths of radiation with altitude.

After flight, BalloonSat shall be turned in working and ready to fly again.

YesBalloonSat design includes the ability to

replace consumables (i.e.. Batteries, SD memory)

BalloonSat is constructed out of resilient materials to minimize the wear caused by Flight.

Flight string interface tube shall be a non-metal tube through the center of the BalloonSat and shall be secured to the box so it will not pull through the BalloonSat or interfere with the flight string. See flight string attachment diagram at the end of this document.

YesBalloonSat design incorporates a plastic tube

for the flight string through the center of the Cube.

Tube is affixed in compliance with specifications laid out in the RFP diagram

Internal temperature of the BalloonSat shall remain above 0°C during the flight.

YesInsulation and Heater are included to

maintain internal temperature.

Cold Testing has verified that a Heater with well charged batteries can maintain an internal temperature above 0°C

Total weight shall not exceed 1,000 grams. Yes Final mass is ~870 grams

Each team shall acquire (not necessarily measure) ascent and descent rates of the flight string.

YesBalloonSat with acquire approximate ascent

rates by matching air temperature curves with known values.

Our team will also acquire accurate altitude values from the GPS unit on the flight string

Design shall allow for a HOBO H08-004-02 (provided) 68x48x19 mm and 29 grams

YesTemperature recording HOBO is fit into the

volume need for all Data loggers.

Design shall allow for external temperature cable (provided)

YesExternal temperature cable fits into the

BalloonSat and is affixed with the probe 2.54cm outside of the Cube.

Design shall allow for an Canon A570IS Digital Camera 45x75x90mm and 220 grams

YesCamera volume and mass are incorporated

into BalloonSat Plan

BalloonSat shall be made of foam core. Yes BalloonSat is constructed of FoamCore

Parts list and budget shall include spare parts. YesBudget includes the purchase of 5-10 spare

LEDs

All BalloonSats shall have contact information written on the outside along with a US Flag.

YesContact information and a US Flag are affixed

to the exterior of the BalloonSat.

Units shall be in metric. Yes All measurements were made in metric units

RequirementDesign Complies? Design Specifications to Comply

Launch is in November 15, 2008. Time and location: 7:30 AM in Windsor, CO. Launch schedule will be given later. Everyone is expected to show up for launch. Only one team member is required to participate on the recovery. Launch and recovery should be completed by 3:00 PM Yes

Entire team will attend Launch, Andrew Zizzi and Logan Wright will participate in recovery.

No one shall get hurt. Yes BalloonSat Zephyr contains no hazardous or sharp materials

All hardware is the property of the Gateway to Space program and must be returned at end of the semester. Yes Hardware shall be returned at the end of the semester

All parts shall be ordered and paid by Chris Koehler’s CU Mastercard by appointment to minimize reimbursement paperwork. All teams shall keep detailed budgets on every purchase and receipts shall be turned in within 48 hours of purchase with team name written on the receipt. Yes Parts were ordered with Chris Koehler's CU credit card

All purchases made by team individuals shall have receipts and must be submitted within 60 days of purchase or reimbursement will be subject to income taxes. Yes Receipts shall be turned in within 60 days of purchase

Have fun and be creative. Yes Fun is being had by all!

Absolutely nothing alive will be permitted as payloads, with the exception of yellow jackets, mosquitoes, fire ants, earwigs, roaches, or anything you would squish if you found it in your bed. Yes No live animals are included in payload.

Completion of final report (extra credit if team video is included) Yes Final report will be completed.