1. S.H.I.E.L.D. CRITICAL DESIGN REVIEW Addison, Travis, Jared, Evan, Aaron, Matt 10/14/08

2. To See the Stars  Mission Overview  Take video of the Stars becoming Visible during the Ascent. Also record during entire Flight to record the Descent as well  We plan to discover the feasibility of using balloon based Imaging platforms over low orbit Telescopes.  We suspect that once above 11km visibility of the stars will increase greatly  We wish to see Astronomical observations with quality similar to low orbiting telescopes, but at a fraction of the cost.  We hope to show that such Balloonsat observations can be taken regardless of time of day (similar to low orbit telescopes)  Answer the question, why are you doing this mission?

3. How to Achieve our Goals  Requirements Flow Down  G1: The S.H.I.E.L.D. BalloonSat’s purpose is to attain an altitude of at least 11 kilometers in order to determine the altitude at which atmospheric disturbance becomes negligible and stars become visible using as CCD camera. The purpose of this mission is to use this information to show that it’s possible to obtain pictures of quality similar to an orbiting space telescope, and far better than ground based observations. We also wish to compare various structural designs, in the hopes of finding a structure that works better than others such that the BalloonSat is reusable. O1: Maintain a clear view of the sky during the entire flight. O2: Using a CCD Imager we will obtain video of the ascent to 30km. O3: A Cannon Camera will provide backup pictures to compare picture Quality. O4: Our Balloonsat will have a Unique design to test out. O5: The Camera’s and equipment will be secured in order to survive the burst and descent.

4. The Specifications  We Shall conduct an Experiment to gather Scientific data  Video Recordings of the Stars becoming gradually more visible during the Ascent  Due to the cold temperatures during flight our design includes a Heater to keep the electronics warm  Balloonsat shall survive flight and be ready to fly again  By using a sound design, and many tests we will ensure our Balloonsat will survive the forces it will experience during the flight  The Balloonsat will stay within 1kg of mass  We’ve weighed all our components and hardware to ensure the weight is within limits  Anything we are not Sure of on the weight we’ve overestimated so that the actually design will be under  Including all the Required Hardware  We have included a HOBO, a Cannon Camera, and an External Temperature sensor in the design  The Balloonsat will be made of Foam Core as per specifications  Design includes Tubing for connection to the Flight String  Ready to fly by Launch Date  Rigorous testing (Various Structure Tests, at least one Cold Test, and Function Tests)  Keeping to Schedule so that Final Design is completed and Ready by Nov. 15 th for Luanch

5. The Build  Design  Our BalloonSat is taking the Form of a Dodecahedron We believe this shape will add Structural Integrity We hope this Shape will prove more Aerodynamic than others Volume to Surface Area ratio is better than other Shapes. PowerSwitchHeater HOBO Relative Humidity Sensor Internal Temperature Sensor Internal External Temp. Sensor Port 1 Cannon Camera Power Switch Memory Card Power SwitchCCD Camera Device Recorder Pressure HOBO Pressure Gauge Internal

6. Parts HardwareAcquisition Status Heater with switch and 3 9V batteriesAcquired Switches (2)Acquired HOBOAcquired Pressure HOBOAcquired External temperature sensorAcquired Aluminum tape (15.5cm x 4.8cm)Acquired Hot Glue (by the stick)Acquired Plastic tubeAcquired Cannon Camera with batteriesAcquired CCD camera with batteriesResearching Foam coreAcquired FlagAcquired InsulationAcquired Plexiglas panelOrdered video recorderResearching Aluminum supportOrdered

7. HardwareQuantityCostWeight Heater with switch and 3 9V batteries1Provided by Space Grant175 grams Switches2Provided by Space Grant11.6 grams HOBO1Provided by Space Grant26.2 grams Pressure HOBO1Provided by Space Grant25.5 grams External temperature sensor1Provided by Space Grant9.3 grams Aluminum tape (15.5cm x 4.8cm)25Provided by Space Grant45 grams Hot Glue (by the stick)10Provided by Space Grant39 grams Plastic tube1Provided by Space Grant18.2 grams Cannon Camera with batteries1Provided by Space Grant220 grams CCD camera with batteries and video recorder 1$125150 grams Foam core (Pentagons of edge length 8.5 cm) 11Provided by Space Grant90 grams Flag1Provided by Space Grant1 grams Insulation (Pentagons of edge length 8cm) 11Provided by Space Grant48 grams Plexiglas panel1Provided by Space Grant25 grams Aluminum support1Provided by Space Grant50 grams Totals$ 125935.2 grams

9. Testing, 1,2,3…  Test Plan  We Plan to use variety of tests to test Structure, Function, and ability to stand the Cold Structure Tests Drop Test Stair Test Whip Test Function Tests Independent Components Interconnected Components One additional Function test during cold test Cold Test Testing the Internal Temperature while Balloonsat is put in a very cold (~ - 60C)

10. The Aftermath…  Structure Tests  We expect the Dodecahedron to survive the tests rather well, and little or no rebuilding will be required  Function Tests  We expect that we will have to perform multiple function tests to ensure all Components work together  Cold Test  This is one of our biggest Worries, but we hope that by making the volume just right One heater and Insulation will keep the Balloonsat warm.

11. Geronimo!  Biggest Worries…  Size Issues Fitting all Components inside the Sat. without making the Volume too large  Cold Test One Heater keeping the Components warm  Time Meeting all the time constraints (~30 days to Launch!)  Scheduling Getting our entire Team together for Regular Meetings