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A Crash Course in Radio Astronomy and Interferometry: 3 ... - NRAO

A Crash Course in Radio Astronomy and Interferometry: 3 ... - NRAO

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Aperture Synthesis<br />

Aperture Synthesis<br />

• sample V(u,v) at enough po<strong>in</strong>ts to synthesize the equivalent large<br />

aperture of size (u max ,v max )<br />

– 1 pair of telescopes → 1 (u,v) sample at a time<br />

– N telescopes → number of samples = N(N-1)/2<br />

– fill <strong>in</strong> (u,v) plane by mak<strong>in</strong>g use of Earth rotation: Sir<br />

Mart<strong>in</strong> Ryle, 1974 Nobel Prize <strong>in</strong> Physics<br />

– reconfigure physical layout of N telescopes for more<br />

Sir Mart<strong>in</strong> Ryle<br />

1918-1984<br />

2 configurations<br />

of 8 SMA antennas<br />

345 GHz<br />

Dec = -24 deg<br />

2

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