Small Satellite Program of ISAS/JAXA
Small Satellite Program of ISAS/JAXA
Small Satellite Program of ISAS/JAXA
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11th BroadSky Workshop “<strong>Small</strong> <strong>Satellite</strong>s, Big Possibilities”<br />
ASTRO-H<br />
- A flagship mission in X-ray astrophysics -<br />
The X-ray Observatory : ASTRO-H (2014)<br />
Highly-redundant large-scale SpaceWire network<br />
ASTRO-H carries more than 40 subsystems connected via a large SpaceWire<br />
network with more than 100 physical SpaceWire connections.<br />
All the command distribution and the telemetry data collection are performed<br />
using RMAP. Time slicing based on SpaceWire Timecode assures deterministic<br />
data transfer avoiding unexpected congestion.<br />
(See Yuasa’s talk on the 3rd day)<br />
14m , 2.7ton<br />
SpW Nodes<br />
SpW Links<br />
Data Rate<br />
Link speed<br />
Data Recorder<br />
Ground<br />
Communication<br />
Mission<br />
Instruments<br />
Munetaka UENO<br />
>40 components<br />
~110 physical connections<br />
> 40 internal routers<br />
~15 Mbps (max)<br />
10-50 MHz<br />
(depending on components)<br />
2GB<br />
S-band ~ 2Mbps<br />
X-band ~ 8Mbps<br />
4 types <strong>of</strong> X-ray telescopes
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