1. Critical Design Review Nick Hoffmann Miranda Rohlfing Geoff Morgan Miles Buckman Lauren Wenner Rahul Devnani October 17, 2006

2. Mission Overview - Objective Our team’s mission is to send a balloon satellite to an altitude of 100,000 feet in order to have it 1) Take still photographs 2) Make a digital recording of the flight 3) Measure the radiation levels of the upper atmosphere.

3. Mission Overview - Goals What we hope to accomplish is: 1) Obtain a visual record of near space and Earth from high altitude. 2) Discover how the radiation levels change at higher altitudes.

4. Design - Parts Still Camera Digital video camera Radiation sensors Temperature probe Wires Film Foam core Aluminum tape Hot glue Small tube Washers (2) 9V batteries (6) 23A batteries (6) Insulation

5. Structure- 18 x 18 x 18 (cm) 555 timer- 4 x 6 x 0.1 HOBO- 6 x 2 x 4 Batteries- 4 x 4 x 1 Radiation sensors- 8 x 6 x 0.1 Still camera- 8 x 6 x 4 Heater- 4 x 4 x 1 Video camera- 4 x 3 x 1

6. Design – Block Diagram Radiation Sensors Video CameraHOBO #1Int. HumidityInt. Temperature External Temperature Power (23A) Timing Circuit Still Camera Switch Heater Power (9V) Switch

7. Testing - Plan Our testing plan is comprehensive and thorough. Each component will be tested more than once and the satellite as a whole will be tested. The tests will progress from simpler tests to more complex ones. Once a subsystem has been tested it will be tested again in all future tests.

8. Testing – Expected Results Due to our straight-forward design we expect the tests to be successful at their conclusion. All of the subsystem were built carefully and they functioned after construction. Testing will confirm that all components of the satellite will function for the mission.

9. Budget - Mass 9V Batteries (3)........ Still Camera.......... Digital Camera......... HOBO............ 3V Battery.......... 12V Batteries (3)........ Structure........... Radiation Sensors....... Heater............ Battery Pack......... Timing Circuit......... Miscellaneous......... TOTAL............ Percentage of Limit....... Remaining Mass........ 138 115 116 27 11 23 150 30 20 10 60 75 775 grams 97% 25 grams

10. Budget - Money Digital video$100.00 camera Radiation$43.00 sensors Wires$10.00 Film$15.00 TOTAL:$200.00 Small tube$5.00 Washers (2)$2.00 9V batteries (3)$15.00 23A batteries (3)$10.00

11. Management - Schedule Task to Be Completed Complete design......... Begin acquiring hardware..... Design Rev A........... Prototyping design........ Drop Test............ Design Rev B and CDR....... Whip Test............ Subsystem Tests......... Cooler Test........... Mission SIM Tests......... Functional Tests......... Subsystem Tests......... Design Rev C........... Finalization........... LAUNCH............ Design Rev D.......... Final Presentation......... Target Completion Dates Sept. 20 Sept. 28 Oct. 5 Oct. 8 Oct. 11 Oct. 17 Oct. 18 Oct. 25 Oct. 29 Nov. 1 Nov. 8 Nov. 9 Nov. 11 Nov. 30 Dec. 5