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Shin'en (spacecraft)
Shin'en, known before launch as UNITEC-1 or UNISEC Technology Experiment Carrier 1, is a Japanese student spacecraft which was intended to make a flyby of Venus in order to study the effects of interplanetary spaceflight on spacecraft computers. In doing so, it was intended to become the first student-built spacecraft to operate beyond geocentric orbit. It was operated by UNISEC, a collaboration between several Japanese universities.
Contact was lost shortly after launch.〔http://www.newscientist.com/article/dn18982-first-studentbuilt-interplanetary-mission-goes-silent.html〕〔http://sites.google.com/site/unitec1ops/home〕
==Spacecraft==
Shin'en measures ,〔(【引用サイトリンク】url=http://www.unisec.jp/unitec-1/en/about_unitec-1.html )〕 and has a mass of .〔 It has no attitude control or stabilisation system. Power is provided by solar cells attached to the outside of the spacecraft, which will produce around 25 Watts of electricity.〔
The primary payload of Shin'en consists of six university-built computers, which will be tested in interplanetary space for robustness against the radiation and extremes of temperature. The spacecraft also carries a camera, and a radiation counter.〔 In order to simplify the system and reduce cost, a low power communications system will be used. It will broadcast a continuous wave with a data transfer rate of one bit per second. UNISEC has invited amateur radio operators to assist in collecting data from the spacecraft.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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