1 / 14

Stratospheric Ozone Experiment

Stratospheric Ozone Experiment. 26 May 2005 Donald Swart Christopher Barber Michael O’Leary Gregg Ridlon Robert Schefferstein. Goals. Measure UVB and UVC attenuation through the stratosphere Approximate the thickness of the ozone using attenuation data “Map” the ozone layer

rangle
Download Presentation

Stratospheric Ozone Experiment

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Stratospheric Ozone Experiment 26 May 2005 Donald Swart Christopher Barber Michael O’Leary Gregg Ridlon Robert Schefferstein

  2. Goals • Measure UVB and UVC attenuation through the stratosphere • Approximate the thickness of the ozone using attenuation data • “Map” the ozone layer • Measure pressure as a function of altitude

  3. Overview of Results UV Data: Uncollected Cause: Programming Error Pressure Data: Collected successfully

  4. UV Data • Circuit retested on the ground successfully • Programming error caused our UV readout to come from an incorrect ADC pin. • Four ADC pins, only three were used (ch 0,1,3), and our data was recorded from channel 2, which had no signal being fed into it

  5. Pressure Data • Pressure measurements were very successful in showing the variation of pressure as a function altitude. • After correcting the zero offset for our circuitry our pressure graph looks accurate, within 17 HPa of the known ground pressure at launch. • Taking this error into account the lowest pressure sustained by our payloads was 93.66 HPa ± 17 HPa.

  6. Pressure Uses • Adding temperature data to our pressure data (thanks go to LA Tech) we were able to calculate several other pieces of data: • Air density • Drag Forces • Potential Torque • Velocity data was inferred from altitude and time stamp data.

  7. Pressure and Altitude vs. Time

  8. Velocity and Density vs Time

  9. Velocity and Altitude vs. Time

  10. Analysis • Sharp Change in Velocity at UT 15:34 • Probable time of SU payload loss • Highest “jerk” • Greatest potential torque (assuming payloads weren’t falling “ducks in a row”) • Time and altitude correspond to the location of the tropopause; lowest temperatures and most brittle state for most plastics

  11. Analysis cont. • Early speculations stated payload possibly lost at tropopause; collected data reinforces original theories. • Velocity Data too inaccurate to reliably calculate drag • Parachute behavior also unknown, only speculated

  12. Improve • Earlier testing techniques • Labeling Programs with proper version numbers • Organized checklist of final assembly steps • Periodic review/revising of checklists • Debug Processes • Teamwork • Time Management

  13. Sustain • Circuit Design • Thermal Design • Finishing the payload despite setbacks • Background Research

  14. Acknowlegments • Lawrence Blanchard • Dr. Kevin Stokes • Lester Langford and Stennis Space Center • NSBF and NASA • LA Tech • LA ACES Panel

More Related