1. Oddballs Critical Design Review Team 8: Grant Fritz, Jessica Brown, Stephanie Jalovec, Jennifer McGraw, Brian Roth, Evan Townsend 10/18/07

2. Mission Statement The purpose of this mission is to capture video of the sky at an altitude of 30 km using a balloon satellite in order to capture images of stars as they immerge in higher altitudes.

3. Mission Overview The mission is to determine the intensity of stars visible during the day at 30km using a calibration lamp as a standard. The goal is to further develop the idea that a telescope can be used on a balloon satellite platform. A high altitude platform would be less expensive than a space telescope. –Smaller telescopes can be used to get images of similar quality to large ground-based telescopes. –With an affordable method of observation, more people will be able to have access to space imaging. –Balloon satellite would be above the clouds, which can often prevent astronomers on earth from observing. –Can be serviced between each launch.

4. The purpose of this mission is to capture video of the sky at an altitude of 30 km using a balloon satellite in order to capture images of stars as they immerge in higher altitudes. Construct Balloon Satellite to improve understanding of high altitude conditions at 30 km for under $200 dollars by 11/10/07 Images of the stars shall be captured using a CCD video camera and a still image digital camera. A large helium weather balloon shall be used to acquire an altitude of 30km The structure of the balloon satellite shall be in the shape of a dodecahedron. A budget of $200 dollars shall be maintained while keeping the mass of the balloon satellite under 800g. The CCD camera shall be angled upward at 54° from horizontal, mounted on one of the faces of the upper half of the dodecahedron. Imaging the sky at 30 km shall improve understanding of high altitude conditions by showing what magnitude stars can be seen during the day. The digital camera shall be angled upward at 54° from horizontal and mounted on another upward facing side of the dodecahedron opposite the CCD camera. The digital camera shall be an HP PhotoSmart digital camera. The structure of the balloon satellite shall be in the shape of a dodecahedron.

5. Design Parts –1500 cm2 Foam CoreProvided –1 Digital HP Photosmart E427 cameraProvided –1 GB Memory chipProvided –1 Timing circuit kitProvided –1 HOBO data loggerProvided –1 Heater kitProvided –12 9Volt BatteriesProvided –12 12V BatteriesProvided –1 Roll of aluminum tapeProvided –1 Roll of Electrical tapeProvided –1 PVC tubeProvided –1 (PC164 CCD Camera)Provided by Eliot Young –1 Video Recorder-7Ordered through Eliot Young –Pentax Lens for PC 164Provided by Eliot Young –Calibration LampCreated by team

6. Design

7. Switch Timing Circuit 12v Battery Switch HP Still Cam (2 internal AA bat) CCD Camera Switch 12v Battery Video Recorder (internal battery and record button) Heater Switch 9V Battery HOBO External Temp Internal Temp Humidity

8. Design ItemMass (g)Cost ($) 1500 cm 2 Foam Core405 1 Digital HP Photosmart E427 camera 219.899.99 1 GB Memory chip227.99 1 HOBO data logger2949.99 1 Heater kits34.45 5 Switches155 12 9Volt Batteries3 x 452 12 12V Batteries4 x 14.42.99 1 Roll of aluminum tape125 1 (PC180XS B/W Ex View Cube Camera) 25118.85 1 MVideo Recorder-7100378.93 1 PVC tube10.50 hot glue and glue gun18 Total669.8729.24 (although all items have been provided)

9. Schedule Week 6: Oct. 22-28 Design Doc. Rev C Whip, Drop, Stair, Cold Tests Week 7: Oct. 29- Nov. 4 Design Doc. Rev C Complete design Finish building satellite (place camera’s, HOBO, and heater in assigned spots) Functional test Week 8: Nov. 5-11 LRR Meeting Design Doc. Rev C DUE (Thursday) LAUNCH Saturday morning! Be there at 5:00AM! Week 9: Nov. 12-18 Design Doc. Rev D Week 10 Nov. 19-25 Design Doc. Rev D Design Doc. Rev D DUE (Thursday) Week 11 Nov. 26- Dec. 2 Final Presentation Week 12 Dec. 3-9 Final Presentation DUE Present Final Presentation in class

10. Job Delegation Team Member: Project Manager TestingStructuresIntegrationCNDHSystems GrantXImaging Test CCD JessicaStair TestXCCD StephanieFunctional Test XCCD JenniferDrop TestXHP Cam BrianCold TestXHeater EvanWhip TestXXHOBO

11. Drop Test We will perform 3 separate drop tests to simulate different possible landing sites –Balcony between ITLL and DLC –Balcony on East side of DLC –South Side Balcony of ITLL

12. Cold Test Hang Satellite inside cooler filled with dry ice Prevent satellite from actually touching the ice

13. Whip Test We shall use objects that will imitate the weight and size of the subsystems We will swing the satellite on a 1.5 meter string to simulate the g-forces of flight.

14. Stare Stair Test Drop down stairs in the DLC Simulate multiple impacts of landing

15. Subsystems Test Test heater for heat out put. Test capability of CCD camera to see stars at ground level –Ability to see 9 th magnitude stars Test capability of HP digital camera to see stars at ground level Test timing circuit for functionality Test hobo during Cold test Test quality of DVR Test calibration lamp for effectiveness

16. Final Test Mission Simulation Test Test all systems for expected duration of the mission Functional Test Test all subsystems in concurrence Precedes mission sim test

17. Expected Results We expect the faintest stars visible at 30 km to be approximately 9 th magnitude. We expect to find the magnitudes of stars observed by comparing them to the standard lamp