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Old 21-04-2014, 11:51 AM
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Paul Haese
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Paul Haese is offline
 
Join Date: Jan 2009
Location: Adelaide
Posts: 9,991
Quote:
Originally Posted by frolinmod View Post
For us Northern hemisphere users checking that checkbox actually means PE data collected with PA=180, not checking it means PE data collected with PA=0 and it doesn't matter which side of the meridian the OTA was pointed. The checkbox is poorly worded. I'm in the Northern hemisphere, always do PE data collection with the OTA on the East side of the mount, pointed to the West side of the meridian with the camera rotated to PA=0. Hence I do not check that checkbox. Confusing, eh? Not to worry, if the PE doubles, just check the checkbox and reprogram it. The whole procedure is supposed to get automated soon anyway.
This is quite interst Ernie, because what I have found is that the curve when checked for pointing in the west and the PE is taken in the southern hemisphere; the curve actually gets more out of phase. Once I worked out that the phase seems to get better by applying the reverse of what seems to be required then the PEC correction is very good. Guide graphs in the last week have been very good despite very average seeing in Clayton Bay.

I am not sure if this is an actual problem that others have found too or whether I have some setting balls up.
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