Team Advisor: Atin Sinha Team Leader: Ashle’ Perry Team Member: Jeremy Robinson

1. High Altitude Imaging and Atmospheric Data CollectionExperiment bySABRE(Scientific Aerospace and Balloon Research Engineers) Team Advisor: Atin Sinha Team Leader: Ashle’ Perry Team Member: Jeremy Robinson Team Member: Nedgby Marcelin

2. Mission Goal 2 • Acquire pressure & temperature data from sea level to stratosphere • Compare the data with that predicted by standard atmospheric model • Compare the data with the recorded value by weather balloon launched same day • Identify possible causes if any variance is observed

3. Mission Objectives 3 • Launch payload from the ground to about 33 km into the atmosphere • Record temperature and pressure data as well as video images • Retrieve the data for post-flight analysis • Compare the data with standard model and experimentally observed data • Make a presentation to the PACER staff

4. Science Objectives 4 • Verify the trend of temperature and pressure variation with altitude as predicted by standard atmospheric model • Compare the observed temperature and pressure with the recorded data in the region on the day of experiment • Determine the variation of the container surface temperature with the ambient temperature • Determine the height of the tropopause and how far it extends • Account for unexpected changes in temperature due to albedo

5. Science Requirements 5 • Record the ambient and surface temperature from -75º C to 35º C every 15 seconds with an accuracy of 0.5º C • Record pressure from above 1000 mb to near vacuum every 15 seconds with an accuracy of 5 mb • Record time synchronized with temperature and pressure recording • Record altitude synchronized with the rest of the data • Record video images of earth’s surface extending to horizon to provide any visual clue for discrepancy in expected result

6. Standard Atmospheric Model(Temperature) 6

7. Standard Atmospheric Model(Pressure) 7

8. Summer Temperature Changes at Ft. Worth in 2009 8

9. Technical Objectives 9 • Record the temperature, and pressure data • Record video images • Build payload that can withstand the environmental conditions of the upper atmosphere (up to about 33 km), and survive landing • Stay within project financial budget • Provide power to the payload for at least 4 hours • Complete PDR, CDR, and FRR on schedule

10. Technical Requirements 10 • Equip the payload with two temperature and one pressure sensors to be able to measure -75º C to 35º Cand1000 to 6 mb respectively • Provide a real time clock to time stamp the data • Install a video camera to continuously record the image • Maintain the interior temperature of the payload above -20º C • Write all information on a non-volatile memory microchip • Use sturdy, lightweight material to construct the payload so that it can survive the environmental condition of upper atmosphere and survive rough landing • Provide lightweight, inexpensive powersupply for the duration of flight (about 4 hours) • Develop and follow a detailed project management schedule to complete the project in a timely fashion and within budget

11. Project Activities 11 • Electrical Circuit Design • Sensors and Control • Power Supply • Software Design and Prototyping • Mechanical Design and Thermal Control • Fabrication and Environmental Testing • Data Acquisition, Testing and Validation • Launch Activities • Post flight Data Processing and Analysis • Documentation and Presentation

12. 12 Mechanical Design

13. Payload Design 13

14. Payload Design 14 • Is a hexagonal foam structure with the following components securely mounted on a sliding partition: • BalloonSat board • Sensor board mounted piggy back • Video camera • 2 Battery packs

15. External structure 15

16. Internal Structure 16

17. Payload Support 17

18. 18 Thermal Design

19. Thermal Design 19 • During the course of the Balloon flight the payload is going to travel through the Troposphere, the Tropopause, and the Stratosphere. • While traveling through these levels in the atmosphere our payload will encounter temperatures ranging from approximately -60°C to 20°C. • The payload will also have to encounter pressures ranging from approximately 100,000 pascals to 1000 pascals. • In addition our payload box will encounter small amounts of shortwave radiation, also called albedo..

20. Thermal Calculations 20

21. Thermal Dynamics Plot 21

22. Weight Table 22

23. 23 Electrical and System Design

24. Electrical Design 24

25. Power Supply 25

26. Power Budget 26

27. Power Discharge for Main Battery Pack 27 Discharge Plot from Kodak.com Plot relating discharge to temperature from Kodak.com

28. Power Discharge for Camera Battery Pack 28 ―Room Temperature ―0ºC ― -21ºC Discharge Plot from Energizer.com

29. Sensor Circuit Board Board 29

30. Software Design 30

31. Data Event Formatting 31

32. Flight Software 32

33. 33 System Testing Results

34. Vacuum Testing 34

35. Thermal Testing 35

36. Shock Testing 36

37. 37 Calibrations

38. Pressure Sensor Calibration 38

39. Temperature Sensor A Calibration 39

40. Temperature Sensor B Calibration 40

41. 41 Data Acquisition and Analysis Plan

42. Ground Software Implementation and Verification 42 • BASIC Stamp programming software • Term 232 software • Microsoft Media Player software • Microsoft Notepad software • Graphical Analysis software • Microsoft Excel software

43. Data Analysis

50. Team SABRE: Albany State University 50