Astro F
Also called Akari (light)
It will perform an all-sky survey at infrared wavelengths, including those of
stars and galaxies.
It was designed to make this survey with greater sensitivity and higher
resolution than those achieved by the
IRAS,
the world's first infrared astronomical satellite.
Right after launch, a problem occured with attitude control (malfunction of the
two-dimensional solar sensor (NSAS)). Power generation is stable. In mid-May
2006, the first images were received.
In May 2011, the satellite started to shutdown when its solar panels are not
sunlit. If the battery issue cannot be resolved, the satellite would be pretty
much unusable.
http://www.isas.jaxa.jp/e/enterp/missions/astro-f/
http://www.ir.isas.jaxa.jp/ASTRO-F/index-e.html
sat-index articles
Prime
contractor
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Platform
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Mass
at launch
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952
kg
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Dry
mass
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Dimension
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Solar
array
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Stabilization
|
|
DC
power
|
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Design
lifetime
|
550
days (cryogenic liffetime)
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It is equipped with a 68.5 cm cooled telescope and two scientific instruments,
namely the Far-Infrared Surveyor (FIS) and the Infrared Camera (IRC).
The FIS has two 2-dimensional detector arrays and observes in four far-infrared
bands between 50 and 180µm.
The IRC consists of three cameras covering 1.7 - 26 µm with a
field-of-view of approximately 10 × 10 arcminutes2. Both instruments have
low to moderate resolution spectroscopic capabilities.
The instruments are kept at a temperature of 6 K by 170 litre of liquid helium.
The helium supply will last for 550 days of observations.
Downlink: 2256.22 MHz