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Old 04-05-2016, 05:39 AM
HenryNZ
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HenryNZ is offline
 
Join Date: Nov 2014
Location: Auckland, New Zealand
Posts: 57
A repost from CN:

I could not seem to get good polar alignment with pole master.

I am using PoleMaster at 36S (New Zealand) in Southern Hemisphere.

I followed the procedure to the letter, and at the end I could see the red and green circle overlap and stay so for a long time.

However, when I used PHD at my target and with DEC guiding turned off, PHD showed clear DEC drift amounting to about 3-5 arc min error.

Since then I have done more tests. I found that after having completed the procedure, an immediate re-test will always show more error. And if I "fix" the error, a further re-test will again show error but in the opposite direction. So the error oscillated between two points.

I also found that rough and fine alignment often do not agree curiously. Say if I have to move sigma octantis (the southern pole star) in the 8 o'clock direction into the green circle on rough align, I often have to move the green circle in the 2 o'clock direction to make it align with the red circle during fine alignment, basically undoing the changes make in the rough alignment step.

I have tried to skip the rough alignment step and just do the fine alignment, but the results are still inconsistent.


I am not sure if I have done something wrong? Have you been getting better results (as verified by DEC drift testing)? If so, are there any tips to achieve that? In particular I like to hear someone from Southern Hemisphere for I suspect it may have something to do with inaccuracy of the Southern Hemisphere "template"...
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