1. RockSat 2010 Harding Flying Bison RockSat-C Rocket Team Harding University Ethan Lilly, Eric Locke, Darah McDaniel, Ed Wilson June 22, 2011

2. Ethan Lilly Software Design Ethan Lilly Software Design Darah McDaniel Fabrication & Spectroscopy Darah McDaniel Fabrication & Spectroscopy Eric Locke Electronics & Testing Eric Locke Electronics & Testing Edmond Wilson Finances & Logistics Team Mentor Edmond Wilson Finances & Logistics Team Mentor David Stair Graphics & Design Technician David Stair Graphics & Design Technician Team Organization

3. Mission Overview The goal of this mission is to measure the absorption spectrum of Earth’s atmosphere as a function of altitude using a mini-spectrometer as a science payload onboard a NASA Terrier-Orion rocket that will reach an altitude of 72 miles, the edge of the atmosphere.

4. Block Diagram of System Lens UV/VIS Spectrometer Signal Conditioner for CCD Array Embedded Controller with 2 GB Memory Embedded Controller with 2 GB Memory PD Signal Conditioner for Photodiode G-Switch Power Distribution System Battery Power Supply RBF Fiber Optic Cable

5. Atmospheric Spectrometer

6. Spectrometer

8. Electrical System The electrical system is composed of three major circuits. –G-switch and power supply circuit –Photodiode amplifier circuit –Spectrometer signal conditioning circuit

9. G-switch and Power Circuit

10. Photodiode Amplifier Circuit

11. Spectrometer Conditioning Circuit A/D converter input range: 0 to +1.25V Input: +1.3 to +2.1V Output: +0.3 to +1.1V

13. Sony ILX511 CCD Linear Array Timing Diagram

15. Fluorescent Light Spectrum

16. Experimental Solar Spectrum Water Vapor Oxygen

17. Integration With Temple University

18. –Lessons Learned Fast A/D conversion is necessary for spectroscopy Communication between disciplines is key in problem solving –Advice for Next Year: Allow time for overcoming problems and testing Design everything before building Test everything several times –What was the hardest part? Learning to work with a new microcontroller

19. Conclusions -We were able to accomplish this project as a team. This project would be very difficult for any one person to accomplish alone. -We learned a great deal about carrying out a complete project. -We are proud of our payload and hope to recover valuable data.

20. Acknowledgement Arkansas Space Grant Consortium NASA Workforce Development Scholarship Program RockSat-C Program Wallops Island Flight Facility