1. Rock Sat-C Conceptual Design Review The New Jersey Space Grant Consortium at Stevens Institute of Technology and Rutgers University Mike Giglia, Ethan Hayon, Robert Hopkins, Jenny Jean, Mark Siembab, Sean Watts 09/30/2011 1

2. CoDR Presentation Contents Section 1: Mission Overview o Mission Overview o Theory and Concepts o Mission Requirements (brief, upper level) o Concept of Operations o Expected Results Section 2: Design Overview o Design Overview o Functional Block Diagrams o Payload Layout o RockSat-C 2012 User’s Guide Compliance o Shared Can Logistics (if applicable) 2

3. CoDR Presentation Contents Section 3: Management o Schedule o Budget o Mentors (Faculty, industry) Section 4: Conclusions jessicaswanson.com 3

4. Mission Overview Experiments: o Atmospheric  O 3  CH 4  CO 2 o Vibration  Piezo vibration of sensor plate o Temperature  Infrared beam pointed on inside skin of rocket o Rotational Frequency  Gyroscope to measure rockets rotational frequency 4

5. Mission Overview: Theory and Concepts Ground level ozone (O 3 ) - a key constituent of the troposphere. It is also a constituent of certain regions of the stratosphere commonly known as the Ozone layer. At abnormally high concentrations brought about by human activities (largely the combustion of fossil fuel), it is a pollutant, and a constituent of smog. As our payload ascends to an apogee of 72 miles, air will flow across our sensors allowing for readings of various gasses at different altitudes Collection of this data will provide an understanding of what instruments can be exposed on a payload due to possible contact with gasses that may cause malfunction or interference. The earth's atmosphere comprised of 70% nitrogen, 21% oxygen, 8% CO 2, and 1% of various other gases. Top 3 greenhouse gas (GHG) are Ozone (O 3 ), Carbon Dioxide (CO 2 ) and Methane (CH 4 ). 5

6. Mission Overview: Theory and Concepts Methane (CH 4 ) - a hydrocarbon that is the primary component of natural gas as well as a very potent and important greenhouse gas, which is a very efficient GHG which contributes to global warming. Both air pollution and global warming could be reduced by controlling emissions of methane gas. Carbon dioxide (CO 2 ) - a colorless, odorless, non-toxic greenhouse gas associated with ocean acidification, emitted from sources such as combustion, cement production, and respiration. 6

7. Mission Overview: Mission Requirements Minimum success criteria o If the payload records partial atmospheric readings of the various gasses (CO 2, CO, SO 2, O 3) the payload will be considered a success. o The AVR data acquisition board records sensor measurements into on-board flash memory storage. o Infrared temperature readings vary throughout flight o Pressure of the atmospheric containment vessel varies throughout flight. 7

8. Mission Overview: Concept of Operations o Payload will take different sensory data throughout the flight, atmospheric tests will conclude shortly after apogee while temperature tests will not conclude until power failure or memory overflow. o Results will include all sensory data per unit time once converted from the payload. o Example on following 2 slides. 8

9. Example ConOps t ≈ 1.3 min Altitude: 75 km t ≈ 15 min Splash Down t ≈ 1.7 min Altitude: 95 km -G switch triggered -All systems on -Begin data collection t = 0 min t ≈ 4.0 min Altitude: 95 km Apogee t ≈ 2.8 min Altitude: ≈115 km End of Orion Burn t ≈ 0.6 min Altitude: 52 km t ≈ 4.5 min Altitude: 75 km Altitude t ≈ 5.5 min Chute Deploys Atmospheric tests begin - When does NASA open the static/dynamic ports? -Infrared temperature readings begin 9 Atmospheric tests conclude. Close redundant input valve.

10. Mission Overview: Expected Results Expected Results: o A steady increase in infrared temperature due to heat from exhaust gas and atmospheric friction is expected during lift off. o Instant High-Z acceleration and low levels of X and Y acceleration. o Gyroscope readings around 7 Hz o Change in pressure when atmospheric port is opened o Pollution level gradient during ascent 10

11. Design Overview Electronics and atmospheric hardware will be mounted on a conventional makrolon plate using screws and brackets. Crucial components consist of: o Thyristor-based activation circuit o Sensor boards for each type of pollutant o Check valve and solenoid pinch valve for redundant splashdown protection o Air sampling Vessel 11

12. Design Overview: Functional Block Diagrams The payload has mechanical, electrical and software interactions within parts of the payload itself. Next two slides show the Functional Block Diagrams of the electrical and mechanical components. blogs.msdn.com 12

13. FBD (electrical) Microcontroller G-SwitchRBF (Wallops) ADC Power SD card Pressure Sensor Infrared Thermometer Gyroscope Power Data CO Sensor CO2 Sensor O3 Sensor SO2 collector 13

14. FBD – Mechanical / System (rough diagram) AVR Board Power Makrolon plate Atmospheric Sample Handling Unit All other sensors Mounts to bottom of AVR plate with standoffs Mounts to top canister with standoffs Connected to each other with standoffs 14

15. Design Overview: Payload Layout Top Plate: 15

16. Design Overview: Payload Layout We plan to use 2 plates in our half-canister. Top plate: o AVR Data Acquisition Board o Batteries Bottom plate: o Air sampling vessel (with sensors inside) o Redundant safety valves o Pressure sensor o Infrared temperature sensor o Accelerometers (x, y, z => high range) o Gyroscopic sensor 16

17. Design Overview: RockSat-C 2012 User’s Guide Compliance Predicted mass – payload - ~5 lbs. Predicted volume – 1/2 Canister Types of activation: o G-Switch with thyristor o Activation to close atmospheric valve o RBF Switch 17

18. Design Overview: Shared Can Logistics We do not have a partner team yet o To collect and analyze data for future space research operations through various experiments designed and implemented on the payload. Plan for collaboration o We are open to any kind of consistent open communication between teams o If the partner team's school is reasonably close we are open to a fit check Structural interface o The team will opt for standoffs but will take other ideas into consideration Our team will use both a dynamic and static atmospheric port grandpmr.com 18

19. Preliminary Fall Semester Schedule 19

20. Preliminary Fall Semester Schedule 20

21. Preliminary Fall Semester Schedule 21

22. Mission o To collect and analyze data for future space research operations through various experiments designed and implemented on a payload. Issues, concerns, any questions o When does NASA open and close the static and dynamic atmospheric ports? Is there any information from previous flights regarding airspeed and pressure through the dynamic ports? Plan for where you will take your design from here? o Anything you need to investigate further? o Are you ready make subsystem and lower level requirements to come up with a rough-draft design for PDR? Conclusion 22