AQT-D (Aqua Thruster-Demonstrator) is a nanosatellite project of the University of Tokyo (UT) Space Propulsion Laboratory with the purpose of testing water-fueled propulsion. The satellite is a CubeSat of 3U size; 1U is occupied by the propulsion system, while the remaining 2U is for the spacecraft bus. AQT-D was carried to space inside the pressurized section of Kounotori 8, a Japanese resupply vehicle for the International Space Station (ISS). Kounotori 8 was launched on 24 September 2019. After arriving at the ISS, AQT-D was deployed to space on 20 November 2019 using the JEMRMS robotic arm at the space station's Kibō laboratory module.
The AQT-D project is led by Jun Asakawa of the University of Tokyo.
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- Looking for the definition of AQT? Find out what is the full meaning of AQT on Abbreviations.com! 'Armed forces Qualification Test' is one option - get in to view more @ The Web's largest and most authoritative acronyms and abbreviations resource.
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AQT-D's spacecraft bus is based on Tasuki (TRICOM-1R), a previous satellite developed by the University of Tokyo and launched in 2017. The satellite is equipped with antennas for store and forwardcommunication.
|Thrust||1 of 4 mN|
|Specific impulse||>70 seconds|
|Water mass||< 0.4 kg|
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AQT-D's propulsion system, called AQUARIUS-1U (Aqua Resistojet Propulsion System-1U), consists of five water thrusters. A single delta-v thruster produces 4.0 mN, and four reaction control thrusters 1.0 mN, for attitude control. The spacecraft carries less than 0.4 kg of water. The delta-v thruster produces a specific impulse (Isp) of 70 seconds, and a maximum 4.0 mN of thrust, which is dependent on available power. AQUARIUS-1U's design was based on the planned deep space probe EQUULEUS's propulsion system. According to the University of Tokyo, AQT-D was the first ISS-deployed satellite to have water-based propulsion. While satellites deployed from the ISS typically have a short lifetime owing to the station's low altitude, satellites equipped with a propulsion system like AQT-D may potentially remain in orbit for an extended period of time.
- ^ abcde'AQT-D: CubeSat Demonstration of a Water Propulsion System Deployed from ISS'. Retrieved 11 August 2019.
- ^Werner, Debra (27 August 2019). 'Water propulsion technologies picking up steam'. SpaceNews. Retrieved 11 September 2019.
- ^「きぼう」から超小型衛星3機放出に成功！ (in Japanese). JAXA. 21 November 2019. Retrieved 21 November 2019.
- ^'Home | AQT-D: AQUA Thruster-Demonstrator'. マイサイト (in Japanese). Retrieved 11 September 2019.
- ^ abcdefAQT-D: Demonstration of the Water Resistojet Propulsion System by the ISS-Deployed CubeSat (PDF). Small Satellite Conference. University of Tokyo. 2019.