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19 June 2021: Our upload server https://upload.astropixelprocessor.com/ has been migrated successfully to our new office with higher upload and download speeds (nearly 10MByte/sec up/down ) ! We now have 1 general upload user called: upload with password: upload. The users upload1 - upload5 have been disabled.

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having issues with stacking.  

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(@stewie_88)
Brown Dwarf Customer
Joined: 9 months ago
Posts: 8
February 28, 2021 20:24  
hey people, i just stacked last nights session with all calibration frames, checked the FITS files in the window, everything looked good, stacked it all and all as i am left with is a black blank area where my image is supposed to be. Has anyone encountered this issue.
If it help i was shooting with the ZWO ASI533mc Pro
I should mention i have been using it for a while and all setting are always the same and never had this before, I did swap over to NINA, I have also redone all my Calibration frames in NINA so all files match. Could someone please help with this issue please. I have attached a screen shot of the resulting image.
 
 
 
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155801791 10157452120726086 4359482976849945906 o

 

This topic was modified 7 months ago by Stuart Whittaker

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(@robinhigg)
Hydrogen Atom Customer
Joined: 9 months ago
Posts: 1
March 1, 2021 08:17  

@stewie_88 

this has also happened to me over the past two nights. There seem to be a few previous threads that relate to this issue with the solution focused around the loaded calibration frames. 

I have used ‘new’ dark frames with older flats and bias frames, so wondering if this could be the issue (although would hope that APP is clever enough to work this out). 

I have yet to try using the old ‘darks’ 

Also someone mentioned something about Open GL button being on/off- not sure what I should be doing here though or what position it should be. 

Robin 


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(@vincent-mod)
Universe Admin
Joined: 4 years ago
Posts: 3694
March 1, 2021 10:31  

Yes, the switch to Nina might be something to look at. Some of these tools don't always write the FITS header properly or save the data properly. What happens when you integrate without any calibration data?


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(@stewie_88)
Brown Dwarf Customer
Joined: 9 months ago
Posts: 8
March 1, 2021 11:23  

I'm not to sure what the issue is here, but I tried to stack some other images taken in NINA from lastnight and they stacked fine. Tried to stack others from 2 and 3 nights ago and they failed. And everything was taken through NINA with no change to any settings. This seems strange to me why frames for 1 night will all stack, but not another night??


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(@vincent-mod)
Universe Admin
Joined: 4 years ago
Posts: 3694
March 1, 2021 12:04  

That is strange yes, but there must be a difference somehow. I can have a look at the data that fails, and the data that works. You can upload a few of both with the calibration frames you used to our server;

Go to https://upload.astropixelprocessor.com and use upload1 as username and upload1 as password.

Create a directory named “stewie_88-integrationfails” and upload in there. Thank you!


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(@stewie_88)
Brown Dwarf Customer
Joined: 9 months ago
Posts: 8
March 3, 2021 13:55  

@vincent-mod

 

Thanks for the upload link. As i am typing this out i am uploading 3 of each file. The first to be uploaded is the failed to integrate files. Followed by the files that will. Again they have all been taken with NINA with the same settings. Everything is the same. 

Thanks again.


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(@vincent-mod)
Universe Admin
Joined: 4 years ago
Posts: 3694
March 4, 2021 11:51  

Downloading them now and will have a look, thanks.

edit: Could you tell me which dates on the file belong to what data? I can't really tell based on the filenames.


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(@stewie_88)
Brown Dwarf Customer
Joined: 9 months ago
Posts: 8
March 7, 2021 22:26  

@vincent-mod

Hi, Sorry for the late reply, I didn't get notified about your response. All images where taken 25/2/21


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(@vincent-mod)
Universe Admin
Joined: 4 years ago
Posts: 3694
March 7, 2021 22:28  

Hi, thanks but I can't really tell which files are which. Would you mind making directories in your location and putting them into the right places? (like one directory which fails and one that works etc)


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(@stewie_88)
Brown Dwarf Customer
Joined: 9 months ago
Posts: 8
March 8, 2021 23:44  

@vincent-mod

 

O have put them into different folders now so should be easy to identify 


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(@vincent-mod)
Universe Admin
Joined: 4 years ago
Posts: 3694
March 9, 2021 13:54  

Thank you! I'll have another look. 🙂


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(@stewie_88)
Brown Dwarf Customer
Joined: 9 months ago
Posts: 8
March 11, 2021 17:22  

@vincent-mod

Hi Vincent. I am wondering, have you been able to check through those files yet.? I know you are possibly really busy with other people but I thought I would check in. Thanks.


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(@vincent-mod)
Universe Admin
Joined: 4 years ago
Posts: 3694
March 11, 2021 17:24  

Not yet sorry! I do have them downloaded and will look asap today.


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(@stewie_88)
Brown Dwarf Customer
Joined: 9 months ago
Posts: 8
March 11, 2021 17:41  

@vincent-mod

OK thanks Vincent, I appreciate it


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(@vincent-mod)
Universe Admin
Joined: 4 years ago
Posts: 3694
March 11, 2021 19:40  

Ok looking at the data now;

I took a screenshot of the file I'm looking at now. It has the name ending in "-10.00_420.00s_002.fits". Is that supposed to be the dark? If so it has quite a bit of light in it, I almost mistook it for a flat. 🙂 So if you can confirm this is a dark, then you need to retake them and make sure it's completely dark. This will cause issues for sure and might be the reason you get the black frame as well. If you try without them, does it work?

Dark

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(@stewie_88)
Brown Dwarf Customer
Joined: 9 months ago
Posts: 8
March 11, 2021 20:30  

@vincent-mod

I didn't think about doing the stack without the darks. Yes it does work. I wonder why the others worked as i included the darks in the stack. Oh well its the ZWO asi533 mc pro so darks are not essential for that camera anyway, or so i have read and been told. But never the less, thanks for the help. I really appreciate it


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(@vincent-mod)
Universe Admin
Joined: 4 years ago
Posts: 3694
March 11, 2021 20:37  

No worries! Not sure why the others did work, but indeed. I think it's worthwhile to make some proper darks though, for bad pixels and such. Also, since the bias are likely made in a similar setup, that may be affected as well. I used to take them covered complete, dark, within a dark bag, outside in the night. 🙂


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