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Old 19-10-2017, 01:56 AM
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luka
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Join Date: Apr 2007
Location: Perth, Australia
Posts: 1,164
PHD2 calibration and drift alignment

Hi,
A question regarding the PHD calibration and drift alignment. My usual setup is:
1. First do the calibration so PHD knows which way the camera is pointing.
2. Then do the drift alignment and change the mount's azimuth and altitude.
3. Start imaging...

My question is if the changes of azimuth and/or altitude invalidate the calibration? Or are these "inaccuracies" in calibration insignificant?

For example, placing the mount on the ground and doing the initial rough alignment with a compass will likely result in a polar alignment that is few degrees out. Should we then do:
1. calibration
2. drift alignment
3. calibration again
4. check the drift alignment again
5. and probably finish with another calibration before imaging?

Haven't really seen anyone talking about this, is it all insignificant?

Thanks for your thoughts
Luka
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