Space Proximity Atmospheric Research above Tropospheric Altitudes HumTemP Team SPARTA Space Proximity Atmospheric Research above Tropospheric Altitudes Jerod Baker Lisa Caraway James Mathis Norfolk State University

Mission Goal Our goal for this experiment is to accurately characterize the atmosphere by investigating humidity, temperature and pressure, as it relates to altitude, within the troposphere, tropopause and lower stratosphere. 9/21/2018 SPARTA - PDR

Science Background 9/21/2018 SPARTA - PDR

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Science Background 9/21/2018 SPARTA - PDR www.greenfacts.org/en/arctic-climate-change/images/earth-greenhouseeffect.jpg

Science Objectives Relative Humidity Measurements above the Tropopause Compare to NOAA (National Oceanic and Atmospheric Administration 9/21/2018 SPARTA - PDR http://www.iarc.uaf.edu/research/projects/strategies_high_res_arctic/high_res_grid.png

Science Objectives 9/21/2018 SPARTA - PDR

Scientific Requirements Data points needed: 100 Minimum pressure measurements: 3 mBars Minimum Relative Humidity Levels: 0%-5% Altitude Resolution: 304.8m (1000ft.) 9/21/2018 SPARTA - PDR

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Technical Objectives Launch 500g payload 30km Collect data in near vacuum environment 9/21/2018 SPARTA - PDR SPARTA - PDR

Technical Requirements Data rate once per minute Temperature and Humidity sensors function in -70 degree environment. Power supply functions in cold Payload withstands force of landing Recover data after landing. 9/21/2018 SPARTA - PDR SPARTA - PDR

Technical Requirements cont. Power ~ 3 hours Interior temperature maintained above -20o C Sensors outside of payload to detect temperature and humidity Minimal movement inside of Payload 9/21/2018 SPARTA - PDR SPARTA - PDR

9/21/2018 SPARTA - PDR System Design

9/21/2018 SPARTA - PDR Payload Diagram

Weight Budget Items Weight (g) Uncertainty (g) Box/Insulation 100 ±10 Circuits 120 ±15 Power & Cables 110 ±20 Total 330 ± 100 9/21/2018 SPARTA - PDR

Software Design: Preflight 9/21/2018 SPARTA - PDR Software Design: Preflight

Software Design: In-flight 9/21/2018 SPARTA - PDR Software Design: In-flight

Software Design: Post flight 9/21/2018 SPARTA - PDR Software Design: Post flight

Data Format and Storage Byte Data Stored Format Sampling Rate 1 Hours 00-24 N/A 2 Minutes 00-59 3 Seconds 4 Temperature TBD 1 pt./ min 5 Pressure 6 RH ##% 9/21/2018 SPARTA - PDR

9/21/2018 SPARTA - PDR Electrical Design

Control Electronics and Sensor Interface 9/21/2018 SPARTA - PDR Control Electronics and Sensor Interface

9/21/2018 SPARTA - PDR Power Supply

Total Min Current drain Total Max Current drain Power Budget Power Source 1 Operational Voltage (V) Current (min – max) (I) Hours to Function (H) Total Min Current drain (I*H) Total Max Current drain BalloonSAT 5V 53.7mA 3 -  161mA  Power Source 2 Pressure Sensor (Approx) 7V - 9V  75mA - 100mA 225mA 300mA  Humidity Sensor (Approx) 7V – 9V 50mA - 60mA 150mA 180mA Temperature Sensor (Approx) 50mA – 60mA 9/21/2018 SPARTA - PDR

System Testing Shock test Software test Vacuum test Thermal test 9/21/2018 SPARTA - PDR

Risk Severity Matrix 5 4 3 Undocumented changes Bad Solder joint Exceed weight budget 3 Not installing new battery for launch Not taking computer/program to launch Payload not recovered 2 Payload dropped preflight 1 9/21/2018 SPARTA - PDR

Timeline 9/21/2018 SPARTA - PDR

Timeline 9/21/2018 SPARTA - PDR

Milestones Preliminary Design Review Critical Design Review Flight Readiness Review Balloon Launch Science Presentation 9/21/2018 SPARTA - PDR

Team leader/Management SPARTA Organization Responsibilities Team Member Email Team leader/Management Dr. Hinton whinton@nsu.edu Mechanical Design Jerod Baker d.j.baker@nsu.edu Software Design JP Mathis j.p.mathis@nsu.edu Electronic Design Lisa Caraway l.a.caraway@nsu.edu 9/21/2018 SPARTA - PDR

Conclusion Launch a balloon payload up to 30km Measure relative humidity, temperature and pressure Compare our data to NOAA’s Reach milestones PDR CDR FRR Science Report 9/21/2018 SPARTA - PDR

Thanks for Your Attention! Q&A