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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 - PowerPoint PPT Presentation
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Overview and Operations of FITSAT-1 (NIWAKA)
RAST2013 Istanbul13th June, 2013
Takushi Tanaka
FITSAT-projectFukuoka Institute of Technology
http://www.fit.ac.jp/~tanaka/fitsat.shtml
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)
CameraHole
Side and Bottom
Side (-Y) Bottom panel (-Z)
CameraHole
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. facesto 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 2012.7.21
Deployment: 5th 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 of3 cell batteries 3 cell batteries
16th Jan. 2013 (6 sec sampling)
Temperatures around flashing LED
from shade to sunshine(1 cycle around the world)
1st Feb. 2013 (1 min. sampling)
Current 3 cell batt.
Voltage3 cell batt.
Strength of beacon signal
Changing sig. strength (437.250MHz,CW)
3rd Nov. 2012
Joachim Köppen DF3GJ Observatoire de Strasbourg
T = 28.5 sec 8th Nov. 2012
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)
Voltage change of solar cells
T = 12.3 (sec)
8th Feb. 2013 (1 sec sampling)
Rotation around Z-axis
Rotation
Period
Energy
Please watch NIWAKA light!
Send me report!
You will receiveverification card:
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