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Old 02-09-2013, 03:25 PM
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Peter.M
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Join Date: Sep 2011
Location: Adelaide
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I might be showing my ignorance here but this seems silly. I understand that the NIR signal is not going to be refracted by the atmosphere as much as conventional OAG stars which could lead to better tracking. But surely the signal that you are collecting is not NIR therefore it is going to move more like a conventional OAG star and therefore be blurred. AO attempts to mimic this movement in fast iterations to combat the seeing. What they are suggesting is that having bad seeing is going to make the mount make corrections that are not actually star movement, which is why we use longer exposures to average out the seeing.

Following the center of a blurred star really well is still going to take an image of a blurred star.
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