[alma-config] [Fwd: Re: Memo 538 draft]

Mark Holdaway mholdawa at nrao.edu
Mon Oct 3 12:08:08 EDT 2005


I will remind our group that in radio astronomical imaging
there is nothing magical about Nyquist sampled visibilities.
We cannot make a perfect image even if we have Nyquist
sampling, and when we do not have Nyquist sampling,
imaging quality degrades gracefully as the object becomes
more complex or the (u,v) coverage falls off.

It has been appreciated that eventually mosaicing observations
will fail as we go to higher and higher resolution and the
Fourier sampling gets further away from Nyquist.

    -Mark




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