AXIOMAXIOMBalloon Sat Balloon Sat Team #2Team #2

Critical Design ReviewCritical Design ReviewOctober 17, 2006October 17, 2006

Gateway To Space Fall 2006Gateway To Space Fall 2006Dustin MartinDustin Martin Ben AndersonBen AndersonDrew GottulaDrew Gottula Jacob RiveraJacob RiveraAdam TrevizoAdam Trevizo Stefan QuanStefan Quan

Mission OverviewMission Overview

• Primary ObjectivePrimary Objective: Cosmic Ray detection : Cosmic Ray detection at high altitude.at high altitude.

• Imaging of the Earth at high altitude.Imaging of the Earth at high altitude.

• ExpectationsExpectations: More radiation detected at : More radiation detected at higher altitudes.higher altitudes.

Axiom Concept DesignAxiom Concept Design

External Design:External Design:•Foam Core CaseFoam Core Case•US Flag DecalUS Flag Decal•Plastic Camera PortholesPlastic Camera Portholes

C A

F

EC

D

A

D

B

C

E

•Power Switches

•Washer Rims

•External Sensor Ports

a+Z Side -Y Side

-Z Side

Camera Window A

Power Switches

External Sensors Camera

Window B

US Flag

Washer Rim

Axiom Concept DesignAxiom Concept Design

Internal Components:Internal Components:•Flight String TubeFlight String Tube •Geiger CounterGeiger Counter •BASIC StampBASIC Stamp •HOBO Data LoggerHOBO Data Logger •Primary CameraPrimary Camera •Secondary CameraSecondary Camera

Top Level Bottom Level

+Z Side

•Timing CircuitTiming Circuit

•12 Volt Battery Pack (1)12 Volt Battery Pack (1)

•9 Volt Battery9 Volt Battery

•Heating UnitHeating Unit

I

H

I

F EJ

I

B

C

D

GH I

A

Axiom Design ConceptAxiom Design Concept

Hardware ListHardware ListItem Selected Hardware Dimensions (cm) Mass (g)

Camera 1 Canon Elph LT 8 x 5 x 3 ~175Camera 2 Argus DC3185 7 x 4 x 1.5 ~125Data Logger HOBO H08-004-02 w/ sensors 6.8 x 4.8 x 1.9 29Geiger Counter Velleman K2645 9.9 x 5.3 x 2.54 ~25Flight Computer BASIC Stamp Rev. Dx. 6.4 x 3.8 x 1.2 14Heating Unit Constructed of ceramic insulators 4 x 3.5 x 1 ~15Timing Circuit Velleman MK111 6 x 4 x 2.5 ~25Batteries (9V) 4x 9V Batteries 4.5 x 2.5 x 1.5 ~30 eachBatteries (12V) 3x 12V Batteries in a Battery Holder 4 x 3.5 x 1.5 ~25Structural Components Foam Core, Aluminum Tape N/A 163*Wiring, Fasteners, Switches Various Negligible ~10Insulation Insulation Foam N/A ~50Flight String Tube 15cm rubber tubing, 1 cm diameter 15 x 1 x 1 ~20

Axiom DesignOptics

Axiom DesignGeiger Counter

Axiom DesignStructure

Axiom DesignHOBO

Axiom Concept DesignAxiom Concept Design

Functional Block DiagramFunctional Block Diagram

HOBO

Internal Temperature

External Temperature

Timing Circuit

BASIC Stamp

Geiger Counter

Power(9V and 12V

batteries)

Camera 1(internal power)

Camera 2(internal power)

Heating Unit

- Denotes a switch

Axiom ManagementAxiom ManagementSchedule

Event Deadline DateDesign Document Revision A October 6, 2006Acquire Secondary Camera October 9, 2006Primary Camera Calibration Complete October 10, 2006Acquire Basic Stamp October 11, 2006HOBO Calibration Complete October 12, 2006Secondary Camera Calibration Complete October 12, 2006Design Document Revision B October 13, 2006Foam Core Construction Complete October 13, 2006Acquire Geiger Counter October 14, 2006Geiger Counter Construction Complete October 15, 2006Basic Stamp Calibration Complete October 16, 2006Insulation and Tube Construction October 16, 2006Prototype Design Completed October 17, 2006Physical Testing on Prototype October 18, 2006Integration of all Components October 20, 2006Cold Test October 23, 2006Ordering of all Back Up Components October 24, 2006Full Testing of Mock Final Design October 30, 2006Design Document Revision C November 9, 2006Completed Final Design November 5, 2006Final System Tests, Checks, and Double Checks November 10, 2006Launch November 11, 2006Reconstruction November 14, 2006Design Document Revision D November 27, 2006Design Expo December 9, 2006

Axiom’s Projected BudgetAxiom’s Projected Budget

• Mass BudgetMass Budget

• Money BudgetMoney Budget

System Items Percent Mass Estimated MassStructure Foam core, insulation, string tube, fasteners 29.10% 233gPower Batteries 18.10% 145gThermal Heating unit 1.90% 15gScience Geiger counter, BASIC stamp, HOBO, sensors 8.50% 68gOptics Camera 1, Camera 2, Timing Circuit 40.60% 325gMiscellaneous Wires, etc. 1.30% 10gMargin 0.50% 4gTOTAL 100% 800g

System Items Percent Cost Estimated CostStructure Foam core, insulation, string tube, fasteners 5.5 $15Power Batteries 0 $0Thermal Heating unit 0 $0Science Geiger counter, BASIC stamp, HOBO, sensors 83.6 $230Optics Camera 1, Camera 2, Timing Circuit 7.3 $20Miscellaneous Wires, etc. 3.6 $10TOTAL 100 $275

Axiom Test Plan

• Structural– Whip Test– Drop Test– Stair Pitch Test

• Environmental– Cold Test– Vacuum Test (if possible)

• Functional

Expected Results

• Up to a certain altitude, counts of cosmic and solar radiation per minute increase exponentially as altitude increases

• Above that altitude, the number of counts per minute decreases due to the thinning atmosphere where the radiated particles interact less with the particles of the atmosphere

Expected Results

• Primary cosmic rays collide with atmospheric particles, producing multiple energetic particles known as secondary cosmic rays. These secondary particles collide with more atmospheric particles and create even more secondary cosmic rays, an effect known as a cosmic cascade.