1. Team Delta Special Recon Ops Launch Readiness Review Taylor Boe Andrew Gilbert Bobby Stillwell Emily Howard Grace Harsha Andrew Buckner November 11, 2008

2. Mission Overview The primary mission of Operation H.A.L.O. is to find the optimal altitude at which one can take quality telescopic images of celestial bodies from a high altitude observatory. By taking light readings of ambient light intensity at all wavelengths at various altitudes up to 30,000 meters using a photometer, and comparing this to past data, we shall achieve an understanding of where ambient light remains constant above our stratosphere, no longer interfering with telescopic imagery. This shall aid future missions in attempting to obtain quality images of celestial bodies at a lower cost compared to current ground based or orbiting telescopes.

3. Design Overview 20 cm Camera HOBO Heater Batteries Heater Flight tube Circuit BASIC Stamp Baffling tube

4. BASIC Stamp Serial to Computer Power Supply

5. Photo resistor (to be mounted at bottom of baffling tube) Photo resistor Circuit

6. Science Experiment Test Results Raw Data Light Intensity Data Time

7. Why is the data raw? When the BASIC stamp records values for the intensity of light, the less light present, higher values are recorded; the brighter the light is, lower values are recorded. So, the raw data needs to be inverted to represent an accurate trend in light intensity.

8. Converted Light Intensity Data Time

9. Test Results: Drop Test, Whip Test, Cold Test  The structural tests were completely successful.  The structure withstood the stair test, and multiple drops of over twenty-five feet.  The whip test failed to hinder the structural integrity of our satellite. It was a success.  The data from the HOBO cold test shows a distinct difference in the internal vs. external temperatures. This indicates that our heater is functional.

10. Temperature Plots Degrees Celsius TimeInternal External

11. Internal Relative Humidity Data Test Time RH (%) This test indicates that the relative humidity decreased slightly inside our structure during the cold test. This is most likely due to the moisture absorbing packets inside.

12. Predictions Light intensity will fluctuate throughout the ascent due to atmospheric distortion and the orientation of the sun. Light intensity will be more intense at the maximum altitude. The sub-zero temperature may affect the performance of the batteries and camera, even though cold tests were promising.

13. Biggest Worries The functionality of our circuit and data storage Retrieving valuable data post-flight Our thermal design successfully withstanding the extreme negative temperatures of near space

14. Requirements and Compliance RequirementCompliance Mass (under 1000 g)Total mass: 983 g Price budget ($150)Total cost: 108.25 dollars American flag and contact information visible outside of structure This is secured to the outside of our structure Camera onboardSecured inside and functioning Temperature data (internal and external) The HOBO will take internal and external temperature and has been tested. No one shall get hurtCarful cutting and caution when soldering