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Old 26-02-2010, 04:10 PM
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browndog (Ian)
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Join Date: Jan 2007
Location: Perth
Posts: 129
It has been reported elsewhere that the numbers reported by Gemini Control Centre (GCC) are in arc seconds.

So based on my results , my polar misalignment in arc minutes are:
Azmuth: 333 / 60 = 5.55 arc minutes
Elevation: -682 / 60 = 11.3 arc minutes

This means that I am about 12.6 arc minutes from the south celestial pole.

I am not sure what an acceptable result in polar misalignment is but given that I see field rotation in images - I guess it needs to be better than this. It has been reported that a misalignment of; A: <3 arc minutes & E: < 3 arc minutes is needed... (or about 4 arc minutes from the south celestial pole.)

Does anyone have any figures for an acceptable polar misalignment?
(Can you achieve 0 arc minutes?)
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