Quote:
Originally Posted by Steffen
Compensation for atmospheric refraction?
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Thanks for the reply Steffen.
I don't think so...
I measured the rate of drift on the meridian at 0deg declination and as low down on the horizon as I could and the rate of drift was higher on the meridian.
I thought it might be compensation for the declinaiton drift caused by polar alignment error ( as stored in the Synscan following alignment ) but the rate is too high. That is, after alot of tweaking of the mount I managed to get the Synscan polar alignment error down to < 15" in either axis and the rate was still around 5"/min when it should be << 1"/min with such low PA error.