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KHU Ground Station

KHU Ground Station. Nayoung Yoon. Agenda. KHU Ground Station (Introduction) Ground Station context diagram Integrated Ground Support Software(IGSS) UHF RF Chain Ground system configuration Ground Station computer configuration Ground Station Equipment Antenna Setting KHU UHF Antenna

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KHU Ground Station

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  1. KHU Ground Station Nayoung Yoon TRIO-CINEMA

  2. Agenda TRIO-CINEMA • KHU Ground Station (Introduction) • Ground Station context diagram • Integrated Ground Support Software(IGSS) • UHF RF Chain • Ground system configuration • Ground Station computer configuration • Ground Station Equipment • Antenna Setting • KHU UHF Antenna • UHF Antenna Pattern • Antenna Test • RF Equipment Test • Transceiver • Transceiver - Helium 100 • TNC

  3. TRIO-CINEMA KHU Ground Station

  4. Ground Station Context Diagram TRIO-CINEMA

  5. Integrated Ground Support Software (IGSS) TRIO-CINEMA

  6. UHF RF Chain TRIO-CINEMA

  7. UHF Ground system configuration TRIO-CINEMA

  8. Ground Station computer Configuration TRIO-CINEMA

  9. Ground Station Equipment TRIO-CINEMA

  10. Ham Radio Deluxe – subprogram TRIO-CINEMA

  11. TRIO-CINEMA Antenna Setting

  12. KHU UHF Antenna TRIO-CINEMA

  13. Elevation Calculate between Astronomical observatory Dorm and Antenna TRIO-CINEMA

  14. Elevation Calculate between Astronomical observatory Dorm and Antenna • The number of Total Contact times : 19226 • The number of out of contact times : 1758 -> 9.14% • Mean Contact time(min) : 8 • Mean out of contact time(min) : 1min 20sec TRIO-CINEMA • Condition • 650 km, Sun-synchronous, Launched 2012-07-01, Ascending node 00:00 • Calculated by STK

  15. Set UHF Antenna TRIO-CINEMA

  16. Test Interface TRIO-CINEMA

  17. UHF Antenna Pattern TRIO-CINEMA

  18. Antenna Test 1 – Rotator operating time TRIO-CINEMA • In manual Max operation time is 5 min • What does it mean exactly? • Just operate 5 min • When rotator has Max torque -> 5 min • Test Method • Tracking continuously 3 Amateur satellite • Rotator had about 1 min interval • Total rotator operation time : 30 min • Test Result • It works very well. Nothing happened. • But KHU has a spare rotator.

  19. Antenna Test 2 – Direction • Rotator moves North 0°, increments to 30°I n a clockwise direction • Check the direction when it comes Counterclockwise from the re-circulated back • Hang the thread at the end of the Antenna for checking antenna’s exactly direction TRIO-CINEMA

  20. Antenna Test 2 - Result 0 °- 60 ° Can’t because Observotary is round shape Rotator should be TRIO-CINEMA

  21. Antenna test 3 – RF Chain TRIO-CINEMA • Test Chain • Handy Transceiver – UHF Antenna – TS2000 Transceiver • Distance • About 900m • KHU Astronomical Observatory - KHU Front gate • Result • Both transceiver work well • Future plan • Connect Helium 100 with handy transceiver for far-field test

  22. Communication Test TRIO-CINEMA • Test Chain • Helium 100 – Computer – TNC – Transceiver • Result (Berkeley) • TNC built in Transceiver • Using GSEOS or the other terminal program – receive data • Result (KHU) • TNC transmit data • Transceiver(TS-2000) transmit and receive well • Connect TNC and transceiver : can’t receive data • Problem : connect cable or setting problem with transceiver -> check problem when I come back to KOREA

  23. Future plan TRIO-CINEMA TNC – Transceiver – Helium 100 test TNC – Transceiver – UHF Antenna – Handy transceiver – Helium 100 test

  24. TRIO-CINEMA THANK YOU

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