1. The Avengers

2.  Measure ozone concentration as it relates to temperature from ground level to approximately 100,000 ft. above sea level.  Using this data, calculate the UV ray concentration in the atmosphere

3.  Sensor  Sensor Interfacing  Control  Power Supply  Power Budget

5.  Acts as a variable resistor. Resistance around 1.2K Ω  Resistance increases with increasing exposure to oxidizing gases, namely ozone and NO 2  Resistance increases linearly from 0-2.4 ppm ozone at approximately 105 Ω per 1 ppm. Resistance increases linearly from 2.4 to 10.5 ppm ozone at approximately 12 Ω per 1 ppm.

6.  The thermistor works as a variable resistor.  Has a negative temperature coefficient, meaning resistance decreases as temperature increases.

9.  Seven 1.5V AA Energizer ultimate lithium in series to make one SUPER battery(10.5 V).  3000 mAh capacity.  Must supply 150 mA for 4 hours. Needs 600 mAh capacity to accomplish.

10.  BalloonSAT draws 53 mA of current.  Each ITO sensor expected to draw less than 10 mA. There are 8 sensors in total.  Thermistor current is negligible as its impedance is on the order of 100k Ω.  The power supply must supply 9V, otherwise the BalloonSAT will not operate.  150 mA is planned for. At four hours of operation, 600mAh will be required.  The power supply voltage will derate to about 90% of its voltage after 4 hours of 200mAh discharge at -20º.

11.  Three Basic Loops  First loop checks all sensors and awaits “go” command.  Second loop cycles readings from multiple sensors.  Final loop retains memory, stops readings, and continues to supply power to the circuit.

12.  Hollow regular hexagonal prism (Internal side: 76mm)  External:  FOAMULAR Insulating Sheathing (Density =.029 g/ cm 3 )  Internal:  Rectangular foam bisecting the payload  Weight Budget:  Components taken into consideration: 320.4g  Components not taken into consideration: 50g  The payload wrapped in a reflective thermal substance

13.  Project Management  Risk Management

14.  Development  Integration  Pre-CDR Mar 4  CDR Mar 30  Flight May 25