Quote:
Originally Posted by PRejto
Erik,
I keep thinking about this issue...but getting nowhere fast!
A couple of thoughts to consider.
1. I think you are further away from polar alignment than you think. The slope of the average position in your photos shows you should be making an adjustment. Just because you don't see drift is not necessarily an indication that all is well. I say that because PA is absolutely a compromise measurement and so where you observe "drift" makes a huge difference. Perhaps your "zero" drift is only a the particular location you measured it. I personally would trust PEMpro on this. Anyway, the adjustment will probably not be too large.
2. Is it correct to equate an azimuth adjustment with declination? I think they are different things, just as I don't think you can say an altitude adjustment is = to RA. This makes me feel a bit more confident that what you are seeing in the saw tooth pattern is related to some sort of PE.
Glad you will post on the PEMpro forum!
Peter
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I had a reply from Ray on the Pempro forum, he didn't believe it was anything associated with PE in the RA, but mentioned tube currents. It's interesting, because I didn't have the primary fans running, and I always do at other times, and the days had been consistently quite warm.
I'm really curious now to see what happens with them on?
Last time I ran the routine, I was under 1 Arc-min according to Pempro, 6 months ago.
Quote:
Originally Posted by gregbradley
Making a T-point model is the best way to do Polar Alignment in my experience. Its worth the cost of the software.
Greg.
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Hi Greg, never used T Point, I'll have a look though.
Erik