Sky Background
- Morten Lerager
- Posts: 69
- Joined: 08 Oct 2021, 14:53
- Location: Denmark
Sky Background
Hi'
After a preprocessing with 20 frames of Pacman I get a Report
I get a table where I can see the sky getting darker as time goes by :
But how is this, to be read. What is the Y axe with a value of 2190 ?
Can I translate it into a Bortle value https://en.wikipedia.org/wiki/Bortle_scale
After a preprocessing with 20 frames of Pacman I get a Report
I get a table where I can see the sky getting darker as time goes by :
But how is this, to be read. What is the Y axe with a value of 2190 ?
Can I translate it into a Bortle value https://en.wikipedia.org/wiki/Bortle_scale
HEQ5 Pro 150PDS 60mm guide. Asiair.
Asi294mc. AA8.
Asi294mc. AA8.
Re: Sky Background
Morten,
I'd assume that the minor (0.45%) improvement is due to the improved SNR with the stack.
I'd assume that the minor (0.45%) improvement is due to the improved SNR with the stack.
- Morten Lerager
- Posts: 69
- Joined: 08 Oct 2021, 14:53
- Location: Denmark
Re: Sky Background
Thank's
If I only gain 0.45% SNR then I didn't hat to stack them at all.
And if I fiddle with the filenames it will come out with another table as you see.
It's seems AA has it's one filename sorting. Expecting a numeric value in the file name.
So I still want to know, what is the graph's Y axe ?
And can I translate it, into a Bortle value ?
If I only gain 0.45% SNR then I didn't hat to stack them at all.
And if I fiddle with the filenames it will come out with another table as you see.
It's seems AA has it's one filename sorting. Expecting a numeric value in the file name.
So I still want to know, what is the graph's Y axe ?
And can I translate it, into a Bortle value ?
HEQ5 Pro 150PDS 60mm guide. Asiair.
Asi294mc. AA8.
Asi294mc. AA8.
- Morten Lerager
- Posts: 69
- Joined: 08 Oct 2021, 14:53
- Location: Denmark
Re: Sky Background
Ahh, thank you Rudi.
Then it would not be possible to convert to Bortle I give.
Bortle is for the eye, ADU for the camera, Gain etc.
But the picture background are dark, and ADU 2100 is pretty dark
The curve shows me the sky getting darker as times goes by.
Right until someone hits the light inside or outside the house.
(don't hope it was the wife )
Then it would not be possible to convert to Bortle I give.
Bortle is for the eye, ADU for the camera, Gain etc.
But the picture background are dark, and ADU 2100 is pretty dark
The curve shows me the sky getting darker as times goes by.
Right until someone hits the light inside or outside the house.
(don't hope it was the wife )
HEQ5 Pro 150PDS 60mm guide. Asiair.
Asi294mc. AA8.
Asi294mc. AA8.