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What is the coordinate origin for FITS orientation in PRISM? TOP-DOWN or BOTTOM-UP

Posté : 14 sept. 2024, 20:52
par dan_adrian
Hello,
Does anybody know coordinate origin TOP-DOWN or BOTTOM-UP?

Thank you very much

Re: What is the coordinate origin for FITS orientation in PRISM? TOP-DOWN or BOTTOM-UP

Posté : 20 sept. 2024, 14:58
par D SAINTE-CATHERINE
In my experience, Prism is Bottom-Up and PixInsight is Top-Down by example.
That means you have to apply a Y miror on your images.

Re: What is the coordinate origin for FITS orientation in PRISM? TOP-DOWN or BOTTOM-UP

Posté : 20 sept. 2024, 21:51
par dan_adrian
Thank you very much