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GONS Critical Design Review

GONS Critical Design Review. Steven Benedict Jake Danser Josh Hecht Brock Kowalchuk Sean Pomeroy Erik Shuttlesworth Matthew Zemel October 17, 2007. Mission Overview

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GONS Critical Design Review

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  1. GONSCritical Design Review Steven Benedict Jake Danser Josh Hecht Brock Kowalchuk Sean Pomeroy Erik Shuttlesworth Matthew Zemel October 17, 2007

  2. Mission Overview • The GONS project includes sending a satellite to Near Space to conduct experiments regarding stabilization, CCD camera imaging, and photovoltaic efficiency • GONS expects to discover an affordable means in which to stabilize BalloonSats traveling in the Earth’s stratosphere • Prove that CCD camera imaging of the stars is possible from altitudes of 20 - 30 kilometers • Discover whether a rigid or flexible photovoltaic cell is more economical for lightweight BalloonSat missions.

  3. Mission Statement The GONS BalloonSat shall ascend to an altitude of approximately 30 kilometers by means of a helium filled balloon where it shall record stabilized video capture and measure solar energy efficiencies to improve our understanding of stabilization, solar energy and video recording methods in high altitude conditions. Mission Objectives – Level 0 O1: Construct a BalloonSat to improve understanding of near space conditions with a mass less than or equal to 800.00g for less than $200 whose internal temperature will stay above 0° C in near-space conditions by 11/9/07. O2: Shall stabilize the BalloonSat along the x-axis for video capture of a point along the horizon during the ascent. O3: Compare efficiencies of flexible and rigid photovoltaic cells as a function of altitude in the range of approximately 1500 meters to 30 kilometers. System Requirements – Level 1 S1: The BalloonSat shall be completed by November 9, 2007 and shall have a mass under 800g, cost less than $200, and shall stay above 0° C during the course of the flight. S2: The BalloonSat shall eliminate spacecraft’s rotation about a vertical axis (parallel to the string) to within a 30° window (± 15°) during the entire ascent. (Goal 20° window) S3: The BalloonSat Shall measure the output power of both types of solar cells during the course of flight. where efficiency is a measure of power output per unit surface area.

  4. Outside View 1

  5. Outside View 2

  6. Inside View 1

  7. Cross Section View of Ball Bearing System

  8. Functional Block Diagram 9V Battery 9V Battery Switch 1 Heater 9V Battery Rigid Photovoltaic Flexible Photovoltaic 4 Port HOBO Data Logger External Temperature Internal Temperature 9V Battery Switch 2 Motor 1 9V Battery Switch 3 Motor 2 CCD Video Camera Digital Video Recorder 12V Battery Switch 4

  9. Test Plan

  10. Expected Results of Science • Stabilized satellite about the vertical axis • Record CCD imaging of the horizon and sky • Rigid photovoltaic cell will output more power • Flexible photovoltaic cell will be more suited for our purposes

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