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Old 17-05-2009, 08:21 PM
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kinetic (Steve)
ATMer and Saganist

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Join Date: Jun 2008
Location: Adelaide S.A.
Posts: 2,293
You are certainly getting there Alex,
can't wait for some LRGB!

Quote:
Originally Posted by Peter Ward View Post
When you stack images that are drifting in a uniform direction the end result is a herringbone pattern in the stacked data.

This pattern disappears with nil drift plus applying a random dither to the guide star tracking.
Peter,

I don't doubt your knowledge of the subject at all, but I have also noticed
this pattern on a few of my DS stacks with a drive artifact similar.
I can totally remove it with a better corrected dark frame (bad pxel
mapping in Nebulosity). Sorry for the OT post Alex!

Steve
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