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  Sunday, 03 October 2021
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Hello all 
i m strugglin since a few hours to process the file of job 1196. 

i cant find a way to calibrate correctly Lum file .
all the fits of this job are shoot in september so i use the latest calib file .

Here is the result of the integration with WPBB with Lum file and calib file: 
Lumintegrationwithflat.png
We can see lots of dust donut 

i try all sort of combination of calib file , corrected flat film by adding some value , it doesnt work 

after a while i integrated without any flats : 
lumintwithoutflat.png

And here is my flat file used before : 
LumFlat.png


we can see that the big donut low-left , is not exactly at the same place on the flat file than on the integration file. 
it is obvious if you switch rapidily between frames in pixinsight. 


I think that the cam has rotate since the flat have been shoot or that dust have move . 

As it is an open scope , i think that flats have to be taken more more often than one each 6months
Also , with this camera , you should take way longer flat .  the LUM flat are 0.02s long exposure. I ve read that on some cmos camera , very short exposure raise problem. I think you should try a dimmer flat planel and have flats shoot with +1s long exposure . 

i dont know if somebody have succeeded to deals with L file on this scope but if yes, please share the recipe :) 


thansk 
florent
10 months ago
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#3777
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hi all 
the new flats are ok for recent job , i quickly process job 1267 NGC7023

be careful , S O H flats flile have fits keyword to light frame . 
NGC7023_pier1.jpg  
Attachments (1)
10 months ago
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#3776
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Pete has done some more today the should be up in a day or two

Steve

Please ignore my dylexia wherever possible, just be thankful I can control my Tourettes ;)

Things to do, so little time!


10 months ago
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#3775
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I have the same problem with multiple datasets. I would also like to have new flats.
10 months ago
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#3774
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hello 
i confirm , i processed job 1267  ngc7023,  it is awfull , so much dust after calibration . 

may be the flat , the dark , i dont know 


I think that a new process should be establish for this pier , may be a flat sesionn each weeks and precalibration of data obtain this week ? to prevent such bad dataset ? 
10 months ago
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#3773
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it seems that the donuts are back again. Maybe its time to retake flats.
10 months ago
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#3772
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Very kind Steve!
11 months ago
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#3771
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I had a quick look at my submitted jobs using LRGB.

1233 - NGC660 is completed but will be affected by the flats problem. However, I notice it has been resubmitted so that is OK.

1106 - M81 is part way through. It should be cancelled and resubmitted unless we can save the RGB data collected so far. In which case I will resubmit without subs we have already collected.

All my other jobs have either, not started, or are narrowband and presumably OK if the Lum flat was the only one affected.

I'll have a look at the narrowband tomorrow, just to check.
11 months ago
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#3770
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We have a good run of clear skies this next 7/10 days

So if you need to put any jobs back in, then now is the time as we are entering unpredictable weather season time for the next month!

So, it's get it while it's hot weather and not to be missed :) :)

Steve

Please ignore my dylexia wherever possible, just be thankful I can control my Tourettes ;)

Things to do, so little time!


11 months ago
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#3769
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Hi 
supplementary dataset are allways welcome , but you dont have to do it :)


It's the fair thing to do from my side however. Syndicates are about working together and that rule applies to us also :)

I will ask Pete and Phil to collaborate over the next week and add some to the share folder :)

Steve

Please ignore my dylexia wherever possible, just be thankful I can control my Tourettes ;)

Things to do, so little time!


11 months ago
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#3768
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Hi 
supplementary dataset are allways welcome , but you dont have to do it :)
11 months ago
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#3767
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I think this is perfectly acceptable for me. 
11 months ago
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#3766
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Exactly! 
11 months ago
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#3765
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Hi Steve, 

That's nice of you and I'm for anything that doesn't cost me. :)

I first did a double read of your post to make sure it said datasets from the 'piers'. I wouldn't be too keen to receive data from your private collection of celebrity closeups. :(

Cheers, 

Ray 


It's just Moles and chins Ray, as you know :)

Please ignore my dylexia wherever possible, just be thankful I can control my Tourettes ;)

Things to do, so little time!


11 months ago
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#3764
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Hi Steve, 

That's nice of you and I'm for anything that doesn't cost me. :)

I first did a double read of your post to make sure it said datasets from the 'piers'. I wouldn't be too keen to receive data from your private collection of celebrity closeups. :(

Cheers, 

Ray 
11 months ago
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#3763
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I am back at work now, not 100% fighting fit  but I am back at least :)

In the meantime I have given the "Flat Issue" some thought and I may have a solution for the lost data.

While Pier-1 starts to now do its thing and play catchup on new data I share some data sets from my other piers to make up for the hiccup ?

Please let me know if you find this solution acceptable or indeed if you have an alternative suggestion I am all ears :)

Kind regards

Steve

Please ignore my dylexia wherever possible, just be thankful I can control my Tourettes ;)

Things to do, so little time!


11 months ago
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#3762
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Well , the problem was raise 04 september.


i think we should have a fresh new start on all the current jobs

in my minds just now , i ve lost envy to process files of this piers, just to discover big donut on file , to try to correct the flat to get descent data before throwing away all L files. 


my point of view


Yes I agree it’s not exactly ideal and it’s a drawback of remote imaging as you are not actually in front of your equipment to see the issue first hand 

The only way to deal with an issue like this is to eliminate causes one step at a time. This is what we did. I am afraid checking flats, taking new flats and testing and re testing takes time.

What I was referring to when I said “sorted quickly” was. Once we highlighted the actual  issue it was resolved very quickly 

However, it took all the other work beforehand from users and us to get to this stage with a resolution that worked.

None the less I will take a proper look at this when I am back at work next week and come up with some kind of solution to the data problem :)

Steve 

Please ignore my dylexia wherever possible, just be thankful I can control my Tourettes ;)

Things to do, so little time!


11 months ago
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#3761
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Florent, 

Thanks for doing that for us. Regarding the earlier submissions some might at least give us something by just using the RGB subs, but I'm not sure if we could salvage them by just capturing new Luminance. 

There is certainly a lot to go back through and perhaps we should all evaluate the ones we have submitted to share the load. 

Cheers, 

Ray 
11 months ago
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#3760
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Well , the problem was raise 04 september.


i think we should have a fresh new start on all the current jobs

in my minds just now , i ve lost envy to process files of this piers, just to discover big donut on file , to try to correct the flat to get descent data before throwing away all L files. 


my point of view
11 months ago
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#3759
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hello 
i ve process the test file . 

thats ok , no dust on processed files
[attachment]Capture d’écran 2021-10-31 154400.png[/attachment] 


the result 

[attachment]RGB.jpg[/attachment]


too bad we have to throw away all files since this summer.... 



Well at least once we found the problem we solved it quite quickly :)

The big question is now, do we just re submit the jobs ?

Steve

Please ignore my dylexia wherever possible, just be thankful I can control my Tourettes ;)

Things to do, so little time!


11 months ago
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#3758
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hello 
i ve process the test file . 

thats ok , no dust on processed files
Capture d’écran 2021-10-31 154400.png  


the result 

RGB.jpg


too bad we have to throw away all files since this summer.... 
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