ASCA
The Japanese Asuka spacecraft (formerly Astro-D), an X-ray mission .
ASCA (formerly
named ASTRO-D) is the fourth cosmic X-ray astronomy mission by Japan's (JAXA), and the second for which the United States is providing
part of the scientific payload. The satellite was successfully launched
on February 20, 1993. The first eight months of the ASCA mission were devoted
to performance verification. Having established the quality of performance of
all ASCA's instruments, the project changed to a general/guest observer for the
remainder of the mission. In this phase the observing program is open to astronomers based at
Japanese and US institutions, as well as those who are located in member states
of theEuropean
Space Agency
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