1. Amelia Weller, Erick Chewakin, Will Hakes, Emma Mossinger, Brendon Barela, Jason Schelz, Ethan Long October 5, 2010 TEAM MATE CRITICAL DESIGN REVIEW Fall 2010 Rev A 08-23-10

2. MISSION STATEMENT The Mission of Team Mate is to design and construct a balloon satellite capable of collecting data on radiation of 395 to 400 nm in wavelength as the payload passes through the atmospheric levels as it ascends to near 100km, as well as remaining intact until recovery by the team and comparison of data to control data recorded on the ground.

3. MISSION OVERVIEW According to NASA’s heliophysics division, the Sun has recently increased its activity level in the form of multiple sun-spots and solar flares. As a result, it is the hypothesis of this team that the Earth’s atmosphere experiences increased amounts of ultraviolet radiation due directly to the solar flares and other solar activities. We shall compare our results to last year’s atmospheric ultraviolet radiation levels as well as to previous student payloads measuring these selfsame values if any exist. This information could be used to predict how the Sun’s activity could affect the Earth and those on the Earth over the next several years of augmented solar activity.

4. REQUIREMENTS FLOW DOWN Project Level Requirements Requirement DescriptionParent Req.Verification P1 The payload shall measure UV radiation as altitude increases Mission Statement Verified through verification of requirements S1-S4 P2 The payload shall record the flight through a series of pictures Mission Statement Verified through verification of requirements S5, S5.1 P3 The payload shall follow the requirements presented in the balloon sat user guide Mission Statement Verified through verification of requirements S5, S6, S7, S8 P4 The payload shall record internal and external temperature along with relative humidity Mission StatementVerified through verification of requirements S9

5. REQUIREMENTS FLOW DOWN System Level Requirements Requirement DescriptionParent ReqVerification S1 The payload shall be able to measure the reverse voltage and current sent by the LED P1 S2 The payload shall have LED's both facing up and facing the earth P1 S3 The payload shall be able to collect voltage data that can be converted into the intensity of the radiation P1 S4 The payload shall store the data recorded from the LED's P1 S5 The payload shall include a camera P2, P3 S5.1 The payload shall have a camera with a sufficient memory that takes pictures every 10 seconds P2 S6 The payload shall not exceed 1.5 kg P3 S7 The system shall be launched by a 3000 g latex balloon to a height of 30 km P3 S8 The payload shall be attached to a flight string P3 S9 The payload shall include a HOBO data logger P4

6. STRUCTURE Design In order to achieve our mission we will have various LED sensors both facing up and facing the earth. Each LED will be encased by a straw in order to make sure the sensor is not oversaturated. Parts At the moment the only parts we need are multiple UV LED’s. These should arrive in a week and the order still must be placed. We will also need amplifiers and resistors in order to measure the voltage being sent back through the LED’s but these will be provided by the ITL.

7. DRAWING

8. FUNCTIONAL BLOCK DIAGRAM

9. SCHEDULE DateTimeWhat 9/76:45 PMFirst Meeting 9/97:30 PMBegin Proposal 9/102:20 PMAssign Specializations 9/147:30 PMTeam Meeting (design complete) 9/156:30 PMTeam Meeting (proposals complete) 9/167:00 AMProposals AND Presentations Due 9/21At aptOrder Hardware 9/287:00 PMTeam Meeting (begin construction) 9/289:30 AMHeater Due 10/57:00 AMDD Rev A/B and CDR Presentation Due 10/57:00 PMTeam Meeting 10/127:00 PMTeam Meeting (prototyping design complete) 10/197:00 PMTeam Meeting (cold test complete) 10/269:30 AMPre-Launch Inspection 10/267:00 PMTeam Meeting 10/289:30 AMMission Test 11/27:00 AMLLR Presentations and DD Rev C Due 11/27:00 PMTeam Meeting (design review) 11/5At aptBalloon Weigh-in and Turn In 11/52:00 PMDLC 270A & LRR Cards Due 11/64:45 AMLAUNCH DAY! 11/167:00 PMTeam Meeting (work on presentation) 11/237:00 PMTeam Meeting (work on presentation) 11/307:00 AMAll Presentations and Data Due 12/49:00 AMDD Rev D and Team Videos Due

10. BUDGET ComponentPrice (including shipping)WeightPlace of Purchase HOBO Data Logger Provided by CU Boulder25.0gn/a Foam core Provided by CU Boulder100gn/a Canon A570IS Digital Camera w/ Memory Card Provided by CU Boulder220.0gn/a 9V Batteries $25101.4gHardware Store Heater Provided by CU Boulder100gn/a Arduino USB Board (Duemilanove) $36.85 + tax32.0gSparkFun Aluminum Tape Provided by CU Boulder10.0gn/a UV LEDs $0.95*40=$385.0gSparkFun PVC Tubing Provided by CU Boulder20.0gn/a Washer and Paperclip Free5.0gWe have these Foam Insulation Provided by CU Boulder20.0gn/a Hot Glue Provided by CU Boulder50.0gn/a Velcro $55.0gHardware Store Switches Provided by CU Boulder 20.0gn/a TOTALS:PRICE:Weight: $104.85713.4

11. TEST PLAN Our payload will go through various tests such as the whip test, drop test, and the kick test in order to test the structural integrity of our payload We will also put our balloon sat in dry ice in order to simulate the cold temperature of the upper atmosphere. We will then see how our balloon sat operates in low temperatures. To test our LED’s we will use the LED’s. We will turn two LED’s on next to each other and if they show signs of having a reverse voltage then we know that the LED’s are absorbing the photons from UV radiation.

12. EXPECTED RESULTS The expected outcome of the data retrieved by this payload will create a general map of the levels of long wave ultraviolet light in the lower levels of Earth’s atmosphere. The data that is expected should reveal an increase in the level of radiation in the atmosphere as compared to comparable reading from as close to a year ago as available, resulting from the upward trend in the solar cycle. The results should give data points which will be plotted on a graph with respect to time.

13. TEAM ORGANIZATION CHART Team MemberAddressPhone #SpecialtyAssistant Position Amelia Weller Cockerell 109 (775)220-4294 Team Leader and Budget/Schedule Testing Brendon Barela Crosman 104 (303)518-7810 C&DH and Science Emma Mossinger Crosman 203 (925)348-0954Testing LeadStructures/Thermal Ethan LongAden(303)587-0220Structures/Thermal LeadElectrical Erick Chewakin Brackett 206 (719)433-1480Electrical Lead Jason Schelz Crosman 120 (203)912-3059C&DHStructure/Thermal Will HakesCrosman 004 (970)749-9158Science Lead

14. BIGGEST WORRIES Time is always a big worry Programming may prove to be difficult Getting the right accuracy in the LED sensors