Editing Polar Alignment (section)

=== Platesolving, Simulated Drift ===
----Astrotortilla & [https://bitbucket.org/Isbeorn/nina/wiki/Home NINA] can be used to plate-solve for a very accurate polar alignment. Either program captures a quick frame of the sky, plate solves it to work out what it is, then slews the mount in R/A and captures another frame. This is a similar principle to drift alignment - the two frames should be along a predictable path followed by the R/A tracking, if the alignment is off then the platesolve will discover where the second frame is in the sky and direct you to adjust the mount accordingly. This has the advantage of giving precise numbers (in degrees, arcminutes and arcseconds) of exactly how far you are away from a proper polar alignment.

Setting up Astrotortilla properly for plate solving is a fairly involved and complicated process and [http://lightvortexastronomy.blogspot.co.uk/2013/08/tutorial-imaging-setting-up-and-using.html a guide to doing so can be found here].  Additioanlly, a basic control guide to [https://bitbucket.org/Isbeorn/nina/wiki/Home NINA's polar alignment method can be found here].
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