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Concept of Operations

Concept of Operations. Stanford AA236. 27 June 2006. Overview. Kentucky Sat (KySat) The Purpose The Team The KySat Concept of Operations Mode 1a and 1b : Analog Modes Mode 2 : Digital Mode Current Questions For KatySat For KySat. KySat Enterprise.

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Concept of Operations

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  1. Concept of Operations Stanford AA236 27 June 2006

  2. Overview • Kentucky Sat (KySat) • The Purpose • The Team • The KySat Concept of Operations • Mode 1a and 1b : Analog Modes • Mode 2 : Digital Mode • Current Questions • For KatySat • For KySat

  3. KySat Enterprise • KySat is a joint enterprise involving: • Public organizations • Private companies • Five Kentucky universities

  4. KySat Enterprise Mission • To advance the capabilities of Kentucky through: • Science and technology education • Research and development • Technology innovation • Workforce development • Economic development • By training students in the areas of: • Spacecraft design and construction • Orbital dynamics • Testing • Operation

  5. KySat-1 Mission • The KySat 1 mission is to: • Develop Infrastructure • Human • Technological • Develop, test, and operate a successful platform that can be use for future advancements in cubesat missions. • Enhance Primary and Secondary Education

  6. KatySat and KySat • The KySat team has been selected to integrate expertise along with current KatySat systems in effort to evolve and complete the KatySat mission. • KySat will build upon previous design work of KatySat. • The team is heavily involved in documentation through the KySat wiki which is open to the KatySat/KySat community.

  7. Morehead State University MS, Industrial Engineering Technology Ground Operations Antennas Communication Systems Jennifer Carter

  8. University of Kentucky PhD, Electrical & Computer Engineering Systems Engineering Embedded Systems Garrett Chandler

  9. Western Kentucky University MS, Computer Science Software Systems Design Systems Integration Greg Strickler

  10. Murray State University Engineering Physics Electronic Power System Solar Arrays Daniel Erb

  11. University of Kentucky Electrical Engineering Communications Antennas Embedded Systems Dale McClure

  12. University of Louisville MS, Mechanical Engineering Mechanical Design Attitude Control & Determination Antennas Solar Arrays Bill Hutchison

  13. University of Louisville PhD, Electrical and Computer Engineering Hardware Payload Alaa Abdel-Hakim

  14. KySat Concept of Operations • KySat will have two distinct modes of operation • The first mode will be geared toward teachers, students and basic users • The second mode will be geared toward advanced users and HAM radio enthusiasts

  15. KySat Mode 1 Operation

  16. KySat Mode 1 Operation • User receives hardware package • Radio • MP3 Player/Recorder • Arrow Antenna • Preamp • General Instruction Booklet • User records audio file • Using website, user enters location to kysat.morehead.edu • School location if desiring audio contact and photo • Target location if desiring remote photo

  17. KySat Mode 1 Operation (cont.) • Server kysat.morehead.edu returns possible pass times over next few weeks via web interface • User selects time, sends audio file to Morehead, selects advanced or basic mode (i.e. Mode 1a or 1b) • User receives confirmation email containing orbital information needed to establish contact • Time entering horizon • Horizon enter point (azimuth) • Peak elevation in degrees • Horizon exit point (azimuth) • Time exiting horizon • Reminder to synchronize clocks with timeserver.morehead.edu

  18. KySat Mode 1 Operation (cont.) • Requested dataset enters queue waiting for next opportunity for S-Band transmission • Queue is flushed to satellite with full data set including audio, time on/off, advanced/basic mode • Email confirmation of upload and aiming information is resent

  19. KySat Mode 1 Operation (cont.) • Contact made • Mode 1a : At entrance to school horizon audio telemetry and uploaded audio file begins playing • Mode 1b : At entrance to school horizon VHF receiver begins to listen for DTMF. Upon DTMF receipt at satellite, audio telemetry and uploaded audio file begins playing • Photos taken • Mode 1a: When overhead, picture sequence begins • Mode 1b: On DTMF command begin picture sequence • On horizon exit UHF/VHF links are shut down

  20. KySat Mode 1 Operation (cont.) • On pass over Morehead the pictures and telemetry are downloaded • Server kysat.morehead.edu builds audio file “recording” as it was played on the satellite • Server kysat.morehead.edu overlays basic contact signature on images • User requesting pass • Time of contact • KySat logo • Recording and pictures are e-mailed to user and archived on the server at Morehead State University

  21. KySat Mode 2 Operation

  22. KySat Mode 2 Operation • User reads on-orbit user guide • User acquires hardware: • UHF/VHF antenna with diplexer • Radio • TNC (AX.25 compatible) • Computer • Aiming Equipment • Compass • Protractor with plumb bob • User reads pass times from Morehead or 3rd party software • User sets up hardware

  23. KySat Mode 2 Operation (cont.) • User activates radio system with an initial command packet • Request type of transmission • Option a: Request send • Option b: Request receive • Interaction will reset timeout • Packet delivery • Option a: User sends packet • Option b: Satellite transmits packet • Interaction will reset timeout

  24. KySat Mode 2 Operation (cont.) • Acknowledgment • Option a: Satellite verifies packet and returns response • Option b: User receives packets • Repeat previous three steps to send more packets • When timeout expires; deactivate transmitter • Future passes over Morehead download data files to server • Post data to website archive

  25. Pressing Questions • UHF/VHF Communications • Power output and link budget assumptions • Documentation on TNC • Powering UHF receiver continuously • S-Band Link • Doppler effect on S-band radio pair • Bandwidth needs vs availability • Size of images / WAV files • Firmware • File system • In-flight reprogrammability

  26. Pressing Questions • Antennas • Deployment • Material • Performance / Characterization • Stability of platform • Communication Registration • IARU for VHF/UHF • FCC / ITAR for 2.4GHz • Passive Stability • Component sources • Sizing of stabilizer components

  27. Current Concerns • More Information Needed • Power system • Camera • VHF/UHF radio • TNC and modem

  28. Next Steps • Develop systems requirements • Parallel processes • Obtain and evaluate hardware • Obtain more documentation • Construct and handle models of systems • Begin CAD model • Bench test subsystems

  29. For more information please visit http://www.engr.uky.edu/idea/wiki/doku.php?id=projects:active:kysat:workspace:default

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