High Voltage Technology Demonstration Satellite “HORYU-II” Kyushu Institute of Technology 2012/3/13 1.

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High Voltage Technology Demonstration Satellite “HORYU-II” Kyushu Institute of Technology 2012/3/13 1

HORYU-II’s goal Education – Hands on experience through system engineering. Bachelor’s, Master’s and PhD (Doctorate in Nano-Satellite Technology, DNST) – Change mind setup for the Nano-satellites Its cost and time effective Can accelerate more space exploration. Technology demonstration – New technology demonstration in space developed by LaSEINE at KIT. – Develop Nano-satellites for various space research.. Business – Develop more new nano-satellites to help people. – Provide support to other (company and/or university) through CNT at KIT 2

High Voltage Technology Demonstration Satellite “HORYU-II” In orbit “300V generation & control of electrical discharge” High-voltage induces Electro-Static Discharges ISS Space factories, space hotel Space solar power system ～ in the middle of 1990 In the middle of 1990 ～ 2012 ～ Voltage, V power, W

※ ©KYOSEMI In Space orbit High Voltage Technology Demonstration Satellite “HORYU- Ⅱ ”

HORYU-II project’s goal Things to be considered when you design a system How to design a flawless system Things to be considered: difficult to foresee Effective method: Think for development What is the best evaluation method? Improvement through satellite operation Learn Manufacturing through real satellite development High Voltage Technology Demonstration Satellite “HORYU- Ⅱ ”

Observation by small camera Consumer product 「 surface potential measurement 」 Demonstration in space High Voltage Technology Demonstration Satellite “HORYU- Ⅱ ”

ELF Detect debris by this sensor Demonstration of electron-emitting film (ELF) for discharge mitigation ELF

Thank you all who help this satellite project. 2012/3/13 Kyushu Institute of Technology Satellite development project Acknowledgment 8

The specification of HORYU- Ⅱ 9 Size 350×310×315mm （ X×Y×Z ） Mass 7.1 kg Operation life time 1 year Orbit Sun-synchronous (680km, 98.2 degree) Solar cell 5 paralle strings of 4 series connected dual junction GaAs solar cells Battery 3 parallels of 3 series, 1.2V, 1900mAh (Ni-MH) Total capacity 5700mAh Power consumption Normal operation mode (CW only) ： 1.13W Normal operation mode (waiting for FM uplink) ： 0.86W Mission mode (Maximum) ）： 2.70W Radio Nishi-musen 301A Transmission Power 1W approx. FM Protocol & modulation Ax.25 &FSK Frequency Up Link ： 145MHz 、 Down Link ： MHz Communication Speed FM communication: 1200bps, CW communication (beacon): 20wpm Atttitude Control Passive control via permanet magnet and hysteresis dumper Thermal control ・ Passive thermal control on the external surface ・ Insulation of battery box and heater control Sensors Solar cell voltage & current Battery voltage & current Temperature (panel inside x6, radio, battery x3) Angular velocity Missions 300V photovoltaic power generation in LEO Demonstration of solar array discharge suppression technologies at 300V Demonstration of electron emission film (ELF) Demonstration of Commercial-Off-The-Shelf surface potential monitor Demonstration of debris sensor Taking photograph of the Earth and distribution of the image for outreach