Team Ramrod

Critical Design Review

Dan Armel, Michaela Cui, Andrew Grimaldi,Kyle Kemble, Silvia Peckham,

Chris Sawyer, & Kelsey Whitesell 2007 October 18TH

lpha megalpha mega

lpha megalpha megaMission:

Travel to 30km on a high altitude weather balloon provided by Edge of Space Sciences (E.O.S.S.).

During ascent photodiodes mounted at the extremities of the balloon will quantitatively measure the levels of light in the Infrared and Visible spectrums.

Mission:

Travel to 30km on a high altitude weather balloon provided by Edge of Space Sciences (E.O.S.S.).

During ascent photodiodes mounted at the extremities of the balloon will quantitatively measure the levels of light in the Infrared and Visible spectrums.

lpha megalpha mega

O1 - The spacecraft shall be a BalloonSat with mass at or below 800 grams and total financial costs at or below $200 in compliance with the RFP.

O2 - The spacecraft shall be launched from Windsor, Colorado and recovered on November 10, 2007.

O3 - The spacecraft shall be configured to attach to a variable position on a string, with 10 other satellites, connected to the balloon launch vehicle.

O4 - The instruments of the spacecraft shall remain intact and functional during a 90 minute ascent to an altitude of 30 km and a 45 minute descent including landing. Additionally Alpha Omega will be fully functional within one week of

recovery O5 - The spacecraft and design document shall meet all requirements

stated in the RFP template S1 - The payload shall record the number of infrared light particles

during a 90 minute ascent within an altitude range of 0 and 30 km

O1 - The spacecraft shall be a BalloonSat with mass at or below 800 grams and total financial costs at or below $200 in compliance with the RFP.

O2 - The spacecraft shall be launched from Windsor, Colorado and recovered on November 10, 2007.

O3 - The spacecraft shall be configured to attach to a variable position on a string, with 10 other satellites, connected to the balloon launch vehicle.

O4 - The instruments of the spacecraft shall remain intact and functional during a 90 minute ascent to an altitude of 30 km and a 45 minute descent including landing. Additionally Alpha Omega will be fully functional within one week of

recovery O5 - The spacecraft and design document shall meet all requirements

stated in the RFP template S1 - The payload shall record the number of infrared light particles

during a 90 minute ascent within an altitude range of 0 and 30 km

ObjectivesObjectives

O1.1- The mass and financial budget shall be divided proportionally among the structural, circuit and science components.

O2.1- The team shall provide a vehicle to travel to the launch and landing site and recover the spacecraft after launch.

O3.1- The spacecraft shall be secured to a string provided by the balloon launch vehicle over the entire 135 minute flight without severing the string at any point.

O4.1- The BalloonSat components will have sufficient power to last for the duration of the flight, also components must be secured to withstand a maximum of 15 times the force of gravity.

S1.1- The photodiodes will measure light in the wavelengths ranging from 1nm to 750nm.

O1.1- The mass and financial budget shall be divided proportionally among the structural, circuit and science components.

O2.1- The team shall provide a vehicle to travel to the launch and landing site and recover the spacecraft after launch.

O3.1- The spacecraft shall be secured to a string provided by the balloon launch vehicle over the entire 135 minute flight without severing the string at any point.

O4.1- The BalloonSat components will have sufficient power to last for the duration of the flight, also components must be secured to withstand a maximum of 15 times the force of gravity.

S1.1- The photodiodes will measure light in the wavelengths ranging from 1nm to 750nm.

lpha megalpha megaRequirementsRequirements

lpha megalpha mega

HOBO

Batteries

Harness

Photometers

Camera

Temp Sensor

555Timer

Basic Stamp

Cold Finger

Heaters

42 cm

14 cm

14 cm

Design DiscussionDesign Discussion

lpha megalpha mega

Parts:Aluminum (30cm x 76.2cm x 0.3cm):

Western Aluminum Recycling: Ordered, arrive: Oct 19th

Basic Stamp II module:Parallax: Ordered, arrived Oct 16th

Mylar Thermal Blanket:R.E.I: Ordered, arrived Oct 12th

Parts:Aluminum (30cm x 76.2cm x 0.3cm):

Western Aluminum Recycling: Ordered, arrive: Oct 19th

Basic Stamp II module:Parallax: Ordered, arrived Oct 16th

Mylar Thermal Blanket:R.E.I: Ordered, arrived Oct 12th

Design DiscussionDesign Discussion

lpha megalpha mega

Objective Begin Date End Date Team Formation September 6, 2007 September 6, 2007

Request For Proposal September 6, 2007 September 20, 2007 Conceptual Design Review September 6, 2007 September 20, 2007

Final Design Review September 20, 2007 September 30, 2007 Design Document Revision A September 25, 2007 October 4, 2007

Materials Acquired September 6, 2007 October 7, 2007 Functional Prototype September 30, 2007 October 7, 2007

Design Document Revision B October 4, 2007 October 9, 2007 Design Revision B Presentation October 4, 2007 October 9, 2007 Design Document Revision C October 9, 2007 November 8, 2007 Circuitry Functionality Test October 7, 2007 October 21, 2007

Photometer Functionality Test October 7, 2007 October 21, 2007 Photometer Calibration Test October 7, 2007 October 21, 2007

Dark Current Calibration Test October 7, 2007 October 21, 2007 Cold Test October 23, 2007 October 30, 2007 Whip Test October 23, 2007 October 30, 2007

Swing Angle Test October 23, 2007 October 30, 2007 Drop Test October 23, 2007 October 30, 2007

Final Design Review November 1, 2007 November 3, 2007 Launch Recap and Report Cards November 1, 2007 November 8, 2007

Final Preparations November 3, 2007 November 10, 2007 Launch and Recovery November 10, 2007 November 10, 2007

Design Document Revision D November 9, 2007 November 29, 2007 Final Design Revision November 10, 2007 November 29, 2007

Final Presentations November 10, 2007 December 4, 2007

lpha megalpha megaScheduleSchedule

Financial Budget:Financial Budget:Item Quantity Estimate Actual Total Balance

Aluminum Sheet 1 $3.00 $3.00 $3.00 $3.00 Mylar 1 $3.95 $4.12 $4.12 $7.12

Circuitry (resistors, diodes, amplifiers, breadboards,

wiring)

10 units $20.00 $20.00 $20.00 $27.12

Basic Stamp 1 $49.00 $54.00 $54.00 $81.12

lpha megalpha mega

Mass Budget:Mass Budget:Component Quantity Estimated Mass Foam Core 2 sheets 50 grams

Mylar 2 sheets 2 grams Aluminum 2 sheets 75 grams

Heaters 3 units 10 grams Connecting Tube 1 units 5 grams Connecting Plugs 2 units 5 grams

H.O.B.O 1 unit 83 grams BASIC Stamp 1 unit 15 grams

555 Timer 1 unit 26 grams Batteries 6 units 204 grams

Photodiode 2 units 120 grams Lens 2 units 10 grams Filter 2 units 10 grams

Cold Finger 2 units 10 grams Science Circuit 2 units 10 grams

Protective Tubing 2 units 10 grams HP E427 Camera 1 unit 137 grams

TOTAL -- 784 grams

lpha megalpha megaThe following tests will be conducted:The following tests will be conducted:

Test PlanTest Plan

Circuitry: Ensure circuitry is integrated and batteries are functional.

Photometer Circuit: Check functionality of photometer circuit.

Photometer Calibration: Check focal length of lens.

Dark Current Calibration: To account for amount of dark current in circuit.

Cold Test: Check thermal systems.

Whip Test:Check structural systems.

Swing Angle:Determine angle at which sun will interfere with photodiodes.

Drop Test:Check structural systems.

lpha megalpha mega

The balloon satellite shall return two sets of data; infrared and visible light levels, both as a function of altitude:First set of data, infrared: Altitude ought to relate to

the infrared light levels inverse proportionally;Second et of data, visible: Light levels should have a

directly proportional relationship to altitude;

With this information it can be determined whether or not high resolution telescopic images are feasible with a lighter than air vehicle.

The balloon satellite shall return two sets of data; infrared and visible light levels, both as a function of altitude:First set of data, infrared: Altitude ought to relate to

the infrared light levels inverse proportionally;Second et of data, visible: Light levels should have a

directly proportional relationship to altitude;

With this information it can be determined whether or not high resolution telescopic images are feasible with a lighter than air vehicle.

Expected ResultsExpected Results