Tenma, known as Astro-B before launch, was Japan`s second X-ray astronomy satellite, developed by the Institute of Space and Astronautical Science. It was launched on February 20, 1983 using a M-3S-3 rocket as the vehicle. Battery failure in July 1984 caused the operation to become limited, and continuing problems lead to the termination of X-ray....
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http://en.wikipedia.org/wiki/Tenma
A Japanese X-ray astronomy satellite, launched by ISAS (Institute of Space and Astronautical Science). It carried detectors developed at the Goddard Space Flight Center with a greater energy resolution (by a factor of two) than proportional counters and performed the first sensitive measurements of ...
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http://www.daviddarling.info/encyclopedia/T/Tenma.html
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