Team Thumbs Up Launch Readiness Review Nick Lenk

Team Thumbs Up Launch Readiness Review Nick Lenk Eddie Cyrus Brian Inglis Chase Prichett Greg Nelson Jake Varey 11/11/08

Overview • Launch is on November 15, 2008 • Balloon. Sat will take readings of photodiodes and solar panels every 5 seconds during flight • Voltage Readings will be analyzed based on altitude to see how light increases as the Balloon. Sat enters near-space

Design Overview • A cube of dimensions 16 x 16 cm with six photodiodes (one on each side) will be hooked up to HOBO data loggers taking voltage data • A solar panel on each side (except bottom) will also take in light and we will record that voltage as well • Heating circuit for warmth • Camera taking pictures every 20 seconds

Test Results Photodiode Functionality Test • Indoor – Multimeter read. 25 V ±. 01 for each of the photodiodes • Outdoor – Multimeter read. 53 V ±. 01 for each of the photodiodes

Tests (cont. ) • Photodiode Calibration Test – Under a known amount of light (9 Watts) the photodiodes read. 41 V ±. 01 • Solar Cell Calibration Test – Under the same light (9 Watts) the solar panels read 1. 42 V ±. 05

Tests (cont. ) • Connected Functionality Test – A string of 3 photodiodes wired in series outdoors read roughly 1. 5 volts – We determined that we must wire the photodiodes in strings of two to ensure that the HOBO limit of 2. 5 volts is not reached – Solar Panels must be also wired individually for same reason

Connected Functionality Test

Tests (cont. ) • HOBO/Photodiode Compatibility Test – Photodiodes were soldered to the wires of the voltage cables which have HOBO compatible 2. 5 mm plugs. – Readings for this test were near to exactly what the volt-meter read

Tests (cont. ) • Digital Camera Test – Camera was set to take pictures every 20 seconds for a period of 135 minutes and we collected the predicted 405 pictures

Tests (cont. ) • HOBO Test / Cold Test – 2. 5 hour cold test Internal Temperature Camera Lens Retracts Heater Starts Helping

HOBO/Cold Test (cont. ) Relative Humidity External Temperature Ice block placed next to sensor

Structural Tests

Flight Predictions • We predict an increase in voltage by as much as 100% (double) from ground to burst.

Worries …

RFP/Proposal/Requirement Compliance Matrix Requirement Optimism Prime Completed Under 1 Kilo 872. 8 g √ Under $150 $33. 00 √ Digital Camera A 570 IS Canon Digital Camera √ Additional Experiment Photodiodes and Solar Panels √ Foam Core -Foam Core Structure -Foam insulation √ Metric Units Degrees Celsius, Meters √ No one getting hurt …