Panoramic Rays Critical Design Review Matt Capron, Brian Gonzales, Kaia Jerde, Harrison McLean, Anirudh Sarsam, Brett Traub 10-18-07

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.

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 11-10-07. 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.

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

Design

Design Block Diagram

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

Cost

Mass Budget

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.

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

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.