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Chelsea WelchTully Baetz
Colin NugenElisabeth MogerCharles Hartman
Anthony Cangelosi
Mission OverviewMission Statement:
The BalloonSat, Big Bang, will ascend to approximately 30 km carrying a GCK-05 Geiger counter that will detect the amount of radiation in the lower atmosphere, specifically the amount of beta particles and gamma rays, as a function of altitude.
Discoveries:We plan to discover when and where the lower atmosphere, which includes the ozone later, filters harmful radiation before it reaches Earth.
Hypothesis:We believe that a majority of the gamma rays and beta particles will be stopped by the ozone layer before they reach the ground.
Why:We want to know how much we are being protected from harmful radiation in order to better understand our ozone layer and appreciate it.
Requirements Flow Down:Level Type Number Requirement
0 (MS)
O 1The BalloonSat shall ascend to an altitude of approximately
30 km during a flight of 90 minutes.
O 2The BalloonSat shall collect data related to radiation in near
space as a function of altitude.
O 3The BalloonSat shall be launched from Windsor, Colorado on
November 7, 2009 at 6:50 A.M.
O 4The total science cost of the BalloonSat shall not exceed
$100.00 and any amount over shall be covered by the team.
O 5 All safety precautions will be taken.
S 6 The BallonSat shall not weight more than 850 grams.
S 7The BalloonSat shall carry hardware that will collect data
during flight.
S 8All components of the BalloonSat shall be tested for
functionality.
1
O 1.1 The BallonSat shall remain intact throughout the entire flight.
O 1.2The BalloonSat shall withstand extreme external pressures
and temperatures during flight. Temperature will be regulated by the heater.
O 2.1The BalloonSat shall carry a Geiger counter that will detect
beta particles and gamma rays as a function of altitude.
O 3.1
O 4.1 Anthony Cangelosi will provide $73.95 for the excess cost.
O 5.1All directions will be followed when building the Geiger
counter.
Requirements Flow Down Continued:
1
O 5.2All safety procedures will be followed while conducting
every test.O 5.3 All directions will be followed on launch day.
S 6.1The Camera, AVR Board, Heater, HOBO, 2 AA Batteries, 3 x 9 Alkaline Batteries, and 2 x 9 Volt Lithium Batteries shall
weigh 500g.
S 6.2
The Geiger Counter, Foam Core, Switches, Aluminum Tape, Glue, Insulation, a 9 Volt Lithium Battery, Plastic tubing, Anti-abrasion Washers, and 2 Paperclips shall not weigh
more than 350g.
S 7.1The BalloonSat HOBO data logger shall measure internal temperature, external temperature, and humidity with the
external temperature cable throughout the flight
S 7.2The AVR Board shall measure ascent and descent rates and
internal pressure throughout the flight.
S 7.3 The Camera shall take pictures throughout the flight.
S 8.1 The Geiger counter shall be tested by using a sealed source.
S 8.2The Geiger counter data from the sealed source shall be
tested, recorded, and analyzed before flight.
S 8.3The Camera, Heater, HOBO, and AVR Board shall be tested
individually for functionality.
S 8.4The entire system of hardware shall be assembled and tested
for functionality
S 8.5The structure will be whip, drop, stair pitch, cooler, vacuum,
and mission simulation tested.
Design:Our design:
The BalloonSat, Big Bang, will be a rectangular prism with dimensions 25x25x9 cm constructed from foam core. It will carry a GCK-05 Analog Geiger counter to an altitude of 30km recording counts to the AVR memory.
How we will complete our mission:We will build the Geiger counter from a kit and connect it to the AVR
board through one of the available analog inputs. The AVR microcontroller will be programmed to record the 0 or 5V signal onto it’s memory.
Parts:The Geiger counter will be ordered from Images Scientific Instruments
on Tuesday, October 6 and is expected to arrive within five days.
Budgets:Item
Weight (grams)
HOBO 30g
Canon A570IS & 2 AA Batteries
220g
AVR & 2 x 9 Volt Lithium Batteries
150g
Heater & 3 x 9 Volt Alkaline Batteries
100g
1 x 9 Volt Lithium Battery 33.8g
Geiger Counter 64g
Plastic Tubing Approx 11g
2 Paperclips Approx 2g
Foam core Structure 24g
Insulation 50g
Aluminum Tape 10g
Glue 20g
3 Switches 15g
Total = 729.8g
ItemWhere Item Will be
Purchased/Ordered FromPrice (U.S. dollars)
Analog Meter Geiger Counter (GCK-05 Model)
Images Scientific Instruments
(imagesco.com)
$148.95
9 Volt Battery (Geiger Counter) and Test Batteries
Office Depot$20.00
Dry Ice Safeway 5.00
Total = $173.95
Schedule:Design Complete Tuesday 9/15/09
Team meeting Wednesday 9/16/09Proposal Due Thursday 9/17/09Begin to acquire hardware and materials not ordered. Saturday 9/19/09
Team meeting Monday 9/21/09Proposal Presentation Due Tuesday 9/22/09Authority to Proceed – Order All Hardware – HW 4 Due. Tuesday 9/29/09
Team meeting Wednesday 9/30/09Begin Building Structure Thursday 10/1/09Team meeting Monday 10/5/09Acquire all necessary hardware Tuesday10/6/09Order Geiger counter Tuesday 10/6/09Team meeting Monday 10/12/09Acquire Geiger Counter Kit– Begin Building
Wednesday 10/14/09
Finish Geiger Counter Saturday 10/17/09Test Geiger counter Sunday 10/18/09
Team Meeting Monday 10/19/09Incorporate GC into structure Monday 10/19/09Finish building payload Wednesday 10/21/09Whip/Drop/Stair Pitch Tests/ Revisions where needed.
Thursday 10/22/09
Function Test, Cooler Test, Vacuum Test And Revisions
Friday 10/23/09
Pay Load Complete Ready to go – Tested Saturday 10/24/09Team meeting Monday 10/26/09Pre-Launch Inspection Tuesday 10/27/09In-Class Mission Simulation Test Thursday 10/29/09Finish BalloonSat Weigh in – Turn in Friday 11/6/09Launch Day Saturday 11/7/09Team meeting- extract data Monday 11/9/09Bring Raw flight data Tuesday 11/10/09Analyze Data Thursday 11/12/09Finish Analyzing Data Sunday 11/15/09Team meeting- Begin Final Presentation Monday 11/16/09Homework 5 due Thursday 11/19/09Finish Final Presentations Friday 11/27/09Presentations Due Tuesday 12/1/09Hardware Turn-in Tuesday 12/8/09Homework 6 Due Thursday 12/10/09
Proposal Requirements:RFP Requirement Compliance
Additional experiments, collection of data, analysis of data
Geiger counter, detecting and recording radiation, analysis with respect to altitude
Analog input not to exceed 5V Geiger counter data to be recorded from 0 to 5 Volts
Interface tube secured and not interfering with flight string
Plastic tube, anti-abrasion washers, and paperclips will be built into structure
Internal temperature remain above -10° C Heater shall regulate temperatureWeight not to exceed 850g Total weight is 729.8g
Acquire ascent and descent rates of flight string Data found by pressure readings
Design allows for HOBO, external temperature cable, Camera, AVR Microcontroller, heater system, and batteries.
All are incorporated into the BalloonSat design.
BalloonSat shall be made of foam core Incorporated into the design
Part list and budget shall include spare partsAn extra sheet of foam core and an extra plastic tube has been included as well as excess glue, tape, and paper clips. The Geiger counter cannot be replaced.
BalloonSat shall have contact information and an American flag.
This will be incorporated into the design on the outside of the foam core once the satellite has been finished.
All units shall be in metric All units in all design documents are in metric.
No one shall get hurtAll safety procedures and instructions shall be followed.
Testing:Post Assembly Functionality Test
Use headphones and background radiation to determine if the Geiger counter is working properly.
AVR – Geiger Counter Integration Test Take measurements of background radiation to
determine if the Geiger counter is properly integrated with the AVR board and if the AVR is programmed to take data properly.
Sensitivity Testing Using a sealed source of Cobalt-90, repeat the
integration test at various distances from the source and compare the results to expected 1/r^2 flux expectations.
Team Organization Chart:Name Tasks Systems Responsibilities
Colin Nugen Help with building, editing documents,
Structure, Science, Research, Power
Chelsea Welch Team leader. Finalize documents and reports, and help with building.
Structure, Research, Science, Electrical
Tully Baetz Conceptual design artist, help with building, editing of documents, team morale booster
C&DH, Research, Structure, Science
Charles Hartman
Structures: design, testing, integrating with other systems, research supplies
Research, Structure, Thermal, Science
Anthony Cangelosi
Budget, help with building and testing.
C&DH, Research, Science, Power
Elisabeth Moger
Electrical, building, and testing, and research
Science, Electrical, Power, Structure
Expected Results:We expect a steep nonlinear increase of counts per minute
up to an altitude of 15 km.After 15 km the counts per minute should drop off .
http://hyperphysics.phy-astr.gsu.edu/HBASE/astro/cosmic.html
Count rate
Altitude
Biggest Worries:Destruction of the Geiger counter
Early and careful assembly allowing extra time for replacement part ordering
Failing to arm the payloadArming with two people to double check its
statusFaulty programming
Program early so help can be sought if neededTime
Sticking to the schedule and performing tasks as early as possible
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