Future Instrumentation for Solar and Stellar Research at Radio ...
Future Instrumentation for Solar and Stellar Research at Radio ...
Future Instrumentation for Solar and Stellar Research at Radio ...
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Originally conceived as a “red shift machine” oper<strong>at</strong>ing <strong>at</strong> 1.4 GHz<br />
<strong>and</strong> below, the basic idea behind SKA is to push to extremely<br />
high sensitivity. For spectral line work, an increase in b<strong>and</strong>width<br />
is not an option. And receiver technology is now approaching<br />
quantum limits. The solution, there<strong>for</strong>e, is to exploit an<br />
extremely large collecting area: one square kilometer.<br />
To put th<strong>at</strong> in perspective, th<strong>at</strong>’s 100 VLAs!<br />
The community – both n<strong>at</strong>ional <strong>and</strong> intern<strong>at</strong>ional – is behind the<br />
basic concept. But the detailed specific<strong>at</strong>ions <strong>and</strong> how to build it<br />
<strong>at</strong> reasonable cost have not been determined.<br />
Several concepts are being considered. A few are:<br />
Large-N arrays (US)<br />
Large-f-r<strong>at</strong>io mirrors with derigibles (Canada)<br />
Many Arecibos (China)<br />
Adaptive reflectors (NFRA)
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