Project YES! Critical Design Review Team Search: Matt Paley, Emily Fuentes, Nick Stohl, Ian Andrzejczak, Jackie Myrose, Erik Horn 10/6/09

Mission Statement Fly to 30 kilometers Collect data on amount of humidity in the air at various altitudes and temperatures –Hoping to find an altitude with low enough humidity to keep ozone from reacting with aluminum Test the effectiveness of foam core to keep the BalloonSat at operational temperature without additional insulation –Design that could allow for more of mass budget to be allotted to science payload

Reasons for Change of Science Mission Ozone degrades after half an hour Not contaminating sample Ozone is extremely reactive: plastics & metals –Aluminum - water vapor –Titanium - weight, cost, manufacturability Small enough but powerful enough motor/chain

Requirements Flow Down: Mission Goal Legend: Type: Reference: GGoalRParent Reference OObjectiveGGoal Parent Reference FFunctionalOObjective Parent Reference PPerformanceCRCross Reference GCGC Gateway Constraint TypeGoal Mission Science Goal GG The Project YES! BalloonSat will fly to an altitude of approximately 30 kilometers. The mission shall be to test how much humidity is in the air relative to various altitude levels and temperatures in hopes of finding where a physical atmosphere sample could be gathered on future missions and brought down without the ozone in the air reacting with an aluminum collection container. At the same time, the Project YES! BalloonSat shall test the effectiveness of foam core at keeping the BalloonSat hardware at operating temperature, without using extra insulation. If a naked foam core layer is sufficient to maintain operating temperature, then the removal of additional insulation would allow for more of the mass to be dedicated to science payload.

Requirements Flow Down : Mission Objective 1 TypeObjective Mission Objectives Level 0 Reference OO1 Team Search shall measure the pressure, temperature and humidity as a function of altitude. G TypeRequirementO1 Objective Requirements Level 1Reference OR1.1 PROJECT YES! shall measure the pressure using both an internal and an external pressure sensor. O1 OR1.2 PROJECT YES! shall take the temperature on the AVR board, in the air pocket, and on the outside of the BalloonSat. O1 OR1.3 PROJECT YES! shall measure the humidity in the air pocket and on the outside of the BalloonSat. O1 TypeRequirement O1 System Requirements Level 2 Reference PR1.1.1 PROJECT YES! shall determine the altitude from the pressure using MATLAB. R1.1 PR1.2.1 PROJECT YES! shall correlate the temperature to altitude using MATLAB R1.2 PR1.3.1 PROJECT YES! shall correlate the humidity to the altitude and temperature. R1.3

Requirements Flow Down: Mission Objective 2 TypeRequirement O2 Objective Requirements Level 1 Reference PR2.1 PROJECT YES! shall measure the temperature inside a box of a single layer of foam core. O2 PR2.2 PROJECT YES! shall further insulate the AVR board to ensure its functioning. O2 TypeObjective Mission Objectives Level 0 Reference OO2 Team Search shall investigate the thermal properties of using one layer of foam core. G TypeRequirement O2 System Requirements Level 2 Reference PR2.1.1 PROJECT YES! shall compare temperatures recorded during the mission to the operating parameters for the AVR board supplied in the user manual. R2.1 CRR2.2.1 PROJECT YES! shall use an additional foam core layer to keep the AVR board above -10° Celsius. R2.2: R3.7 PR2.2.2 PROJECT YES! shall have an air pocket between the two foam core layers. R2.2

Requirements Flow Down: Mission Objective 3 TypeObjective Mission Objectives Level 0 Reference GCO3 Project YES! shall comply with all requirements set by Gateway to Space RFP. G TypeRequirement O3 - Gateway Requirements Level 1 Reference GCR3.1 The BalloonSat total mass shall not be more than 850 g. O3 GCR3.2 The COSG subsidy shall not exceed $ O3 GCR3.3 The payload shall allow for secure mounting to the Balloon Rope via a tube inserted into the design and build of the BalloonSat. O3 GCR3.4 The BalloonSat shall have a visible American Flag on its outside surface. O3 GCR3.5 BalloonSat must be constructed of either foam core or Aluminum. O3 GCR3.6 Team Search shall determine the accent and decent rates of the BalloonSat. O3 GCR3.7 The AVR board shall be kept at above -10° Celsius. O3 GCR3.8 The BalloonSat shall be able to fly again after landing. O3

Requirements Flow Down: Mission Objective 3 Cont. TypeObjective Mission Objectives Level 0 Reference GCO3 Project YES! shall comply with all requirements set by Gateway to Space RFP. G TypeRequirement O3 - Gateway Requirements Level 1 Reference GCR3.1 The BalloonSat total mass shall not be more than 850 g. O3 GCR3.2 The COSG subsidy shall not exceed $ O3 GCR3.3 The payload shall allow for secure mounting to the Balloon Rope via a tube inserted into the design and build of the BalloonSat. O3 GCR3.4 The BalloonSat shall have a visible American Flag on its outside surface. O3 GCR3.5 BalloonSat must be constructed of either foam core or Aluminum. O3 GCR3.6 Team Search shall determine the accent and decent rates of the BalloonSat. O3 GCR3.7 The AVR board shall be kept at above -10° Celsius. O3 GCR3.8 The BalloonSat shall be able to fly again after landing. O3

Parts HS1101 Humidity Sensor (2) Pressure Sensor (1 additional) HOBO (Two temperature sensors) AVR (Temperature and pressure sensors) As of now nothing has been ordered, our goal is to have all parts ordered by Thursday It should take approximately 5-7 business days for shipping, so the hardware should be delivered by October 16 th

Design Draw designs on foam core, cut out pieces (leaving paper in tact for folding, 45 degree edges) and cut out holes for wires, connections and camera hole Attach sensors to foam core walls with hot glue, attach camera/HOBO/batteries with duct tape/velcro, and heater/AVR with screws Routing and securing wires throughout box and to the holes we cut in foam core Structural support made of foam core attached to inner and outer boxes Close box by gluing sides together and sealing with aluminum tape

Design continued

Functional Block Diagram

Testing Plan and Schedule –Making sure our materials will work for the purposes we are assigning to them. Ongoing –Testing the entire design of the BalloonSat itself (Whip test, drop test, stair test) : Whip, Drop, and Stair Testing –Making sure our weather sensors are operational through : Sensor Testing

Testing Plan and Schedule Cont. –Testing the software and codes to ensure they run correctly Ongoing –Testing the subsystems (including heating and CCD camera, mass and power limitations) : Cold Test –Full scale mission simulation : Full System Simulation : Full System Simulation

Monetary Budget BudgetActualETCEAC ComponentQuantityUnitCost EaBudgetQuantityActualEstimateTotal Digital Camera1Ea$ GB Memory Card1Ea$ AVR Microcontroller1Ea$ HOBO Data Logger1Ea$ Heater Kit1Ea$ Switches2Ea$ Foam Core1Lot$ Miscellaneous Structure1Lot$ Test 9-volt Batteries8Ea$2.50$20.00 $0.00$20.00 Butterfly Valve3Ea$10.00$30.000$0.00 Small Motor3Ea$4.50$13.500$0.00 Chain1Ea$3.00 0$ " x 6" Aluminum Plate2Ea$7.98$12.50 $0.00 Dry Ice10lbs$1.00$10.00$0.00$10.00 HS1101 Humidity Sensor2Ea$4.99$0.00 $9.98 $89.00 $0.00$39.98

Mass Budget

Schedule Build Prototype for Testing Whip, Drop, and Stair Testing Completed Buy Any Extra Hardware Necessary Build Main Structure of Box Attach Sensors to AVR Board Test Sensors through Complete Satellite Built Full System Simulation Cold Test Second Full System Simulation Pre-Launch Inspection In-Class Mission Simulation Test Troubleshooting through Design Document Rev C Due Final Weigh-in and Turn In Launch Analyze Data through Design Document Rev D Due Final Presentations Due Design Expo BalloonSat Hardware Turn In We will also be meeting together weekly as an entire team, on Saturday mornings from 9 – 11 am, in order to check in with each other and make sure all aspects of the BalloonSat are still working together as they should be and/or trouble shoot and fix problems as they arise. Smaller groups will meet to work on specific tasks as needed throughout.

Organization Chart

Expected Results Data to create a weather satellite that can accurately measure temperature, pressure, and humidity during altitude changes. There exists a correlation between humidity and altitude. The unique design for heating of the satellite will work more efficiently than that of a normal box shape.

Biggest Worries Data corruption Structural stability Reusability Thermal problems