Overview and Operations of FITSAT-1 (NIWAKA) RAST2013 Istanbul 13 th June, 2013 Takushi Tanaka FITSAT-project Fukuoka Institute of Technology

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

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

 Second Mission: Morse code mode, 10Hz mode

Green:230W Red:160W

Communication System

Antennas of NIWAKA 437MHz 1.26GHz 5.84GHz

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

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

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

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

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

Inside (+X)

Inside(-Y)

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

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

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

Beam Pattern 5.8G Patch 5.8G Parabola 435M Yagi

Tanegashima Isrand to ISS

Deployment: 5 th Oct. 2012, 00:44

Pictures from NIWAKA  First Picture

ドイツ Bochum Observatory AMSAT-DL team

LED light from NIWAKA

(Ebina City, Kanagawa Pref.)

(Mikame Town, Nishiyo City, Ehime Pref.)

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

Telemetry by beacon Temperatures around full sunshine by Colin, VK5HI

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

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

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

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

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

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

Rotation around Z-axis Rotation Period Energy

Please watch NIWAKA light ! Send me report! You will receive verification card: