Micro satellite research and development is valuable mainly for the following reasons: (1) practical education of spacesystem engineering and human resource development, (2) rapid demonstration in space of advanced technologies at component and equipment level, (3) implementation of science missions and actual application missions by ultra-small satellite (constellation), (4) discovery and development of new space engineering and high-value-added business fields. As a practical demonstration under laboratory-student leadership, Matunaga Lab at Tokyo Tech, now at ISAS/JAXA has been developed nanosatellites including World first CubeSat CUTE-I, Cute-1.7 + APD, and Cute-1.7 + APD II, which were all launched into Earth orbit and operated. Now，a 50kg-class satellite named TSUBAME is researched and developed to observe earth and celestial bodies in cooperation with several Japanese university laboratories and students. This introduces the nanosatellite activities of Matunaga Lab.

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Cubesat “WE WISH (World Environmental Watching & Investigation from Space Height)” is one of the first satellites deployed from the Japanese Experiment Module (JEM) of the International Space Station (ISS). One of the purposes of the development was to contribute to technology education at local schools and to promote utilization of data obtained by a small satellite. The other purpose was technical demonstration of subsystems Meisei Electric had developed for cubesat, such as a small thermal infrared camera, a power supply system, and an attitude control system. WE WISH was successfully deployed from ISS at 23:37 (JST) on October 4th, 2012. After the deployment, we succeeded in receiving radio signal from WE WISH. WE WISH gradually lowered its altitude due to air resistance of upper atmosphere and as a consequence it re-entered Earth’s atmosphere on March 11th, 2013.

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JEM Small Satellite Orbital Deployer (J-SSOD) is the small satellite launcher, which is capability of deploying CubeSats, 30-50cm class satellites, into the space from the International Space Station (ISS). This paper shows the explanation of the system and specifications for the J-SSOD, and results of the demonstration mission for the J-SSOD.

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The lecture introduces how to make a microcomputer-controlled, electronic device for a beginner. A series of lectures provides not only how to measure a physical property with an electronic sensor, convert it to a digit (analog digital conversion), switch on and off an electronic circuit with FET (Field Effect Transistor), and control those with a microcomputer but also practical know-how to design an actual electronic circuit, choose appropriate electronic parts, and mount those to a PCB (printed-circuit board), with explaining how to make “an acceleration switch”. The switch can automatically turn on and off a connected device according to an acceleration level measured with an acceleration sensor and contribute to parabolic flight experiments through size reduction of an apparatus, less operation, and precise control of the experiments.

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