1. Panoramic Rays Critical Design Review
Matt Capron, Brian Gonzales, Kaia Jerde, Harrison McLean, Anirudh Sarsam, Brett Traub

2. Mission Overview Objective
The object of this mission is to test the amount of light intensity gathered by solar cells at different altitudes and take a panoramic image at near space.
The balloon satellite will take the instruments to a near space altitude where at intervals they will measure the amount of light intensity collected.
Two cameras angled so they slightly overlap will be used to take pictures of the horizon. These will depict a much larger space than could be achieved with one camera.

3. Requirements Flow Down
G.1
Panoramic Rays will test the amount of light intensity gathered by solar cells at different altitudes up to approximately 30,000 km and take a panoramic image at near space.
O.1
Build the Panoramic Rays BalloonSat for under $200 and deliver it on time prepared to launch by
S.1.1
Have a working BalloonSat which has met all testing requirements in time for launch.
S.1.2
Successfully operate under Cold Test.
S.1.3
Structure must be intact after Whip Test.
S.1.4
Structure must be intact after "Stair" test.
O.2
Measure the light intensity of the atmosphere as it varies with altitude.
S.2.1
Measure the voltage which is created by solar cells attached to the BalloonSat.
S.2.1.1
Measure the Voltage within ±.2mV.
S.2.1.2
Take measurements every 30m during the ascent.
O.3
Take two pictures at approximately the same instant from two cameras mounted inside the BalloonSat.
S.3.1
Take two pictures within 1 second of one another allowing menial time for movement.
S.3.2
When BalloonSat is recovered, combine images to create a panoramic image.

4. Design Parts Ordered How long will it take to get the parts?
8 Solar Cells
Voltage input cable
How long will it take to get the parts?
Have By 25 October 2007

5. Design

6. Design
Block Diagram

7. Management Schedule September 20, 2007
Proposal design completed: CoDr Presentation
September 26, 2007
Team 4:00; begin revision of design
September 30, 2007
Have design completed
October 1, 2007
Design Document Revision A due
October 3, 2007
Team 4:00; Design prototype
October 4, 2007
Begin second revision of design
October 6, 2007
All hardware being used is known
October 7, 2007
Team 11:00; find all hardware
October 10, 2007
Team 4:00; begin building of design
October 17, 2007
CDR slides and Design Document Revision B due
October 20, 2007
Team 11:00; construction
October 21, 2007
Team 4:00; construction
October 22, 2007
October 24, 2007
Team 4:30; testing
October 28, 2007
Cold test
November 2, 2007
Team 4:00; test final design
November 8, 2007
LRR meeting and Design Document C due
November 9, 2007
Team 4:00
November 10, 2007
LAUNCH DAY!!!
November 12, 2007
November 25, 2007
Team 2:00
November 29, 2007
Design Document Revision D due
December 1, 2007
Team 12:00
December 4, 2007
Final Presentation due!
Schedule

8. Cost

9. Mass Budget

10. Testing (Systems) Systems Test
Each internal component will be tested for a length of time similar to the flight time
We will be looking to see if anything was wired incorrectly in a component
Causing battery to drain faster than it should
Incorrect data being collected
Once subsystems completed, entire system as a whole tested in similar way.
Heater Test
Place the sat in a cooler filled with dry ice for 2+ hours
If the temperature inside the balloon sat drops too low for its components to work, change the insulation design.

11. Testing (Structural) Drop Test Construct prototype
Dropping model from approximately twenty feet
Should give us idea of how well the balloon sat will hold up on impact
If it fails, it will be strengthened with new shape and/or materials.
Whip Test
Determine whether the system can hold its structure during the descent
Model tied to a short string and swung as fast as possible
Simulate the forces that will act on it during descent.
If it fails this test, we will reattach the internal systems of the sat more securely

12. Expected Results System/Heat Test Drop/Whip Test
No problems expected with heater/timing circuits
Less than 2.5 Volts to HOBO Logger
If more -> Zener Diode
Drop/Whip Test
Don’t expect current structure design to be perfect with such a unique design.
Plenty of extra mass allotted for structural reinforcement.