The locations of three of four mini satellites developed by Japanese students and launched by a rocket carrying a planetary probe last week are unknown, aerospace development committee officials at the science ministry said Wednesday.
Only students at Soka University have continued receiving radio signals from its satellite, Negai, since it was delivered into space Friday along with the Venus probe Akatsuki and the other three satellites produced by universities and technical college students.
Kagoshima University received signals shortly after the launch but was unable to confirm whether they came from its KSAT satellite. The university has had no contact with the satellite since then.
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