Hi Paul,
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Thanks for your thoughts and observations!!!
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No idea what could cause or did cause the RA drift to reverse on 3/14.
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The RA drift on 3/13 was about 200a/s in 40' with a PA error of 9.1. On 3/14 Drift was 140a/c in 40' with a PA error of 0.1. Better PA reduced the drift.
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I'm currently researching RA drift discussions on CN and so far have read thoughts on the cause being atmospheric refraction and the effect of tracking rate, (Sidereal vs King) on drift. Nothing yet on reversal. Still digging...
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And still trying to imagine how drift reverses. I've checked the guide scope/camera and I can't find anything not snugged down.
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Thanks,
Topher
