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Overview and Operations of FITSAT-1 (NIWAKA)

Overview and Operations of FITSAT-1 (NIWAKA). RAST2013 Istanbul 13 th June, 2013 Takushi Tanaka FITSAT-project Fukuoka Institute of Technology http://www.fit.ac.jp/~tanaka/fitsat.shtml. Missions of NIWAKA. High-speed transmission (5.84GHz, 115.2kbps) Twinkle as

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Overview and Operations of FITSAT-1 (NIWAKA)

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  1. Overview and Operations of FITSAT-1 (NIWAKA) RAST2013 Istanbul 13th June, 2013 Takushi Tanaka FITSAT-project Fukuoka Institute of Technology http://www.fit.ac.jp/~tanaka/fitsat.shtml

  2. Missions of NIWAKA • High-speed transmission (5.84GHz, 115.2kbps) • Twinkle as an artificial star (first experiment)

  3. First Mission: • 5.8GHz module (Logical Product. Corp.) • Freq. = 5.84GHz • RF-output = 2W • DC-input = 15W • Speed = 115.2kbps • Band width = 300kHz • Modulation: FSK (±50kHz)

  4. Second Mission: Morse code mode, 10Hz mode

  5. Green:230W Red:160W

  6. Communication System

  7. Antennas of NIWAKA 437MHz 1.26GHz 5.84GHz

  8. Structures of NIWAKA Camera Hole Cutting square pipe Top panel (+Z)

  9. Side and Bottom Camera Hole Side (-Y)Bottom panel (-Z)

  10. Batteries Rithium-ion battery (maxell INR18650PB2G)1450mAH (sigle+3series) 3～4 V, max 25 A

  11. Solar cells • 2 cells x 4 sides (+X,+Y,-X,-Y) 4.7 V x 0.49 A ≒ 2.3 W (each side)

  12. CPU board RX-CPU, TX-CPU, Power controller, Sensor amp.

  13. Inside (+X)

  14. Inside(-Y)

  15. Inside(-Z) Neogi.magnet behind PCB 1.26GHzRX(behind –Z panel)437MHz Ant. Flight Pin

  16. Orbit and Posture (South path) 5.8GHz Ant. faces to the ground st. (North path) 437MHz Ant. stands vertically.

  17. Ground Station 5.8GHzLNB Parabola with Telescope 437MHz, 1.26GHz Yagi Antenna

  18. Beam Pattern 5.8G Patch 5.8G Parabola 435M Yagi

  19. Tanegashima Isrand to ISS 2012.7.21

  20. Deployment: 5th Oct. 2012, 00:44

  21. Pictures from NIWAKA • First Picture

  22. ドイツ　Bochum Observatory AMSAT-DL team

  23. LED light from NIWAKA

  24. (Ebina City, Kanagawa Pref.)

  25. (Mikame Town, Nishiyo City, Ehime Pref.)

  26. (Dec. 14, 2012, Tadashi HAYASHI, Toyama Science Museum)

  27. Telemetry by beacon Temperatures around full sunshine by Colin, VK5HI

  28. Voltage and Current around flashing LED 16th Jan. 2013(6 sec sampling) Current of Voltage of 3 cell batteries 3 cell batteries

  29. Temperatures around flashing LED 1st Feb. 2013 (1 min. sampling) from shade to sunshine (1 cycle around the world) Current 3 cell batt. Voltage 3 cell batt.

  30. Strength of beacon signal • Changing sig. strength (437.250MHz,CW) 3rd Nov. 2012

  31. Joachim Köppen DF3GJ Observatoire de Strasbourg T = 28.5 sec 8th Nov. 2012

  32. Voltage change of solar cells 6th Nov. 2012(3 sec sampling) • ３３秒でZ軸中心に回転 X → Y → -X → -Y(left rotation) T = 33 (sec)

  33. Voltage change of solar cells 8th Feb. 2013(1sec sampling) T = 12.3 (sec)

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