BalloonSat “Optimism Prime”Team “Thumbs Up”

Conceptual Design Review

Nick Lenk, Greg Nelson, Eddie Cyrus, Jake Varey, Chase Pritchett, Brian Inglis9/23/08

Mission Overview

• The BalloonSat “Optimism Prime” shall ascend to an altitude of approximately 30,000 meters in order to measure the intensity of light as a function of altitude, the acceleration of the satellite during the flight, the inside and outside temperatures, and the humidity to better understand the conditions of “near space.”

• We are doing this project because we are curious of how the sun’s intensity increases as a satellite approaches “near space.”

Design: Parts• Foam Core: 0.2904 m2 • Insulation: 0.2904 m2

• 2 x HOBO data logger – Voltage measurement cable– Accelerometer– External Temperature Sensor

• 6 x Photodiode• 2 x Solar Panel• Digital Camera• Cable • Heater• Batteries (3 x 9V, 2 x 1.5V, 2 x 3V)

Design: Functional Block Diagram

Design: Blueprint

Management

Management: Schedule• Design Completion by September 22nd.• Foam core shell shall be built by October 4th to be ready for Whip, Stair, and drop testing.• Order all hardware by October 2nd with the expectation that they will all be received by

October 9th.• Prototype design shall be completed by October 14th.• Final construction of BalloonSat to be built by October 21st.• Final BalloonSat testing, including cold test shall be completed from October 21st through

November 4th.• Conceptual Design Review slides are due September 23rd.• Design Document Review A due October 9th.• Critical Design Review slides are due October 14th.• Design Document Review B is also due October 14th.• Design Document Review C is due November 6th.• Launch Readiness Review slides are due November 11th.• Design Document Review D is due December 2nd.• Final presentation is due December 2nd as well.

Budget: Weight• Maximum Weight: 1000g (I kg)• Digital Camera: 220g• HOBO data logger: 29 g x 2 = 58 g• 9V Battery: 45.6 g x 3 = 136.8 g• Foam Core (.2904 m2) = 264.6 g• Photodiodes: 0.25 x 6 = 1.5 g• Solar Panel (40 cm2) = 2 x 3.36 g = 6.72 g• Cords/Cables: Approx. 50 g• Heating Unit: 68.4 g• Insulation: Approx. 50 g• Total: 856.02 g

Budget: Money

• Photodiodes: 10 x 1.25 = 12.50• Second HOBO data logger: $115.00• Voltage Cord for HOBO: $8.00• Various Cable: $5.00• Estimated Shipping costs: Approx. $10.00• Total: $150.50

Biggest Worries

• Last minute problems• Time schedule – Not enough time to build/test/rebuild/retest/etc.

• Prof. Koehler’s review of this proposal