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Mosaic allignment issue


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Does anyone use APP for stictching mosaics together?


I took a 4 panel of the Heart nebula last night - used NINA to generate the sequence - everything appeared to shoot OK.  I followed a tutorial on the APP site for building the mosaic, and I've had an issue where the bottom 2 panels won't allign correctly in the middle (vertically) - but everything else seems to line up OK. It's annoying, because I was rather please with the rest of the result!


Attached is the final image (reduced x.7) and a crop of the affected issue.  Has anyone seen this before? Not sure if it's a data issue, or a "me not knowing how to use APP correctly" issue.





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Answering my own question here:


There's a great demonstration of the Photometric Mosaic Script on the Astro Imaging Channel on YouTube that sorted this right out - and without too much messing around either!

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