1. Team SCREAM Launch Readiness Review
Joshua Yeaton, Kevin Dinkel, Christopher Warren, Christopher Kopacz, Conrad Schmidt
11/11/08

2. Mission Overview
The primary mission of Project SCREAM shall be to create a satellite in compliance with the RFP to ascend to an altitude between 25,000 and 30,000 meters to measure the difference between the audibility of sound at launch altitude and the maximum altitude achieved by the satellite.
The secondary missions of Project SCREAM shall be to acquire photos of the curvature of the Earth, measure the internal humidity of the satellite, measure internal and external temperature, and measure altitude and flight path of the satellite.

3. Design Overview

4. Design Overview (Cont)

5. Test Results Mission Simulation All science hardware works for 3 hours
Heater lasts for about one hour – need lithium batteries

6. Test Results Cold Test All hardware performs at 0 degrees Celsius
Only problems relate to battery life (timing circuit and heater)

7. Cold Test: Internal Temperature

8. Sound Testing Cold Test (45 min)- Sound Data Elapsed Time (s)
Main Frequency A3
Harmonic Frequency A4 41
-40
-30.3
810
-36
-38
1823
-38.4
2664
-37
Elapsed Time (s)
Distortion Threshold
Relative Decibels (dB)

9. GPS Testing
GPS Test performed during Cold Test

10. Structural Testing
Satellite passed all relevant Structural Tests

11. Expected Results Relative intensity of sound decreases with altitude.
Viable GPS plot of entire flight.
Photographs of curvature of Earth.
Internal temperature greater than 0 degrees Celsius at all times.

12. Concerns Loss of GPS tracking above a certain altitude
Sustained battery life
Safe landing of satellite

13. RFP Compliance
Team SCREAM shall comply with the following RFP requirements:
An additional science experiment is installed inside of the BalloonSat involving the measurement of sound amplitude as a function of altitude.
After flight, the BalloonSat shall be turned in working and ready to fly again.
The plastic tubing provided shall be installed through the center of the satellite so that it can be easily connected to the balloon tether. It will be connected in such a way that it will not pull through the BalloonSat or obstruct the flight string.
With the heater provided and the layout of our design, the BalloonSat’s enterior will not go below the minimum temperature of 0 degrees celcius.
The entire electronic system, with the exception of the external temperature probe, will remain within the main structure of the BalloonSat.
Our total weight shall not exceed a total of 1000 grams.
We will acquire the ascent and descent rate of the flight string using data from our internal GPS system.
The Balloonsat design allows for a HOBO H that is 68x48x19 mm and 29 grams.
The Balloonsat design allows for external temperature cable.
The Balloonsat design allows for an Canon A570IS Digital Camera that is 45x75x90mm and 220 grams.
The structure of the satellite shall consist of foam core, insulation, and aluminum tape.
Contact information and a United States flag shall be visibly displayed on the exterior of the satellite.
All parts were ordered using Chris Koelher’s CU mastercard, and thus, all hardware is property of the Colorado Space Grant Consortium and will be returned to the Colorado Space Grant Consortium at the conclusion of the semester.
No one shall get hurt during the design or launch of the BalloonSat.
The satellite shall be in working condition within one week of launch on 11/15/2008.
A final report shall be submitted and a presentation given involving the final design and results of Team SCREAM’s mission.