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Re: [APML] OT: New M106 Composite

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>>>>> "rg" == Robert Gendler <robgendler@worldnet.att.net> writes:

    rg> The Nyquist sampling theory is outdated.

Well, not exactly, just generally misapplied and misunderstood.

I can tell that even 20 years ago when doing doing high-frequency
time-series data, we generally aimed at 10x Nyquist for our sampling.
That is almost certainly overkill for astro image data, but that
Nyquist is only giving you a bound for the minimum you need to collect
all the data.  Collecting a bit more leaves room for the
post-acquisition filters to massage the data without introducing their
own artifacts.

roland
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                       PGP Key ID: 66 BC 3B CD
Roland B. Roberts, PhD                             RL Enterprises
roland@rlenter.com                            6818 Madeline Court
roland@astrofoto.org                           Brooklyn, NY 11220

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