Paul Imm replied to the topic 'Image capture is failing' in the forum. 2 weeks ago

Yes, I am crossing my fingers that there won't be a reoccurrence.

Since this is not a normal behavior within the Stellarmate OS, I am wondering whether I might have done something to remove the write privilege.  If this happens again I'll want to look further into it.  For now it's good to get back to imaging again.

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Paul Imm replied to the topic 'Image capture is failing' in the forum. 2 weeks ago

Yesterday evening I reached out to Stellarmate support and Jasem provided the details for restoring drive write status.

In my case it would be sudo chown -R stellarmate:stellarmate /media/stellarmate/Picture

I tried this out and it actually restored my ability to take images on my flash drive!

Jasem did say that by default the permissions should allow write on the flash drive.  The remaining question in which I might never know is why my drive lost it's write privilege from the Stellarmate OS on the pi device.

Hopefully this will help others in a similar predicament.  I really appreciate the help in being able to identify and solve the issue.

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Paul Imm replied to the topic 'Image capture is failing' in the forum. 2 weeks ago

Alfred, this shows up as a permissions issue with the initial string.

 



I see the same result when I try the ls -la /media/stellarmate/Picture string.

 

If this is a permissions issue it does look like there aren't any write privileges for some reason.  Am I seeing this correctly?

How would you get back the write privileges?

 

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Paul Imm replied to the topic 'Image capture is failing' in the forum. 3 weeks ago

Alfred, I tried your suggested string and the copy didn't work.

Yesterday I erased the data on the disk so I didn't have a Light folder to match with the string.  I was able to add a new folder called Light.

After that I reran the string and it still failed to complete the action.

So I can manually make a folder but the pi doesn't appear able to copy over a file.

Is there a way to turn off and on the Read only?

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Paul Imm replied to the topic 'Image capture is failing' in the forum. 3 weeks ago

Hy,

That was a good idea to try, but I found that on my MacBook at least I can write on the disk.

I'll see what happens after formatting.

Paul

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Paul Imm replied to the topic 'Image capture is failing' in the forum. 3 weeks ago

Hello Hy,

Thank you for suggesting some things to check for.

I am seeing that images can be saved to the pi but can't save to the media disk.

Everything else doesn't show any issue in what I see. The folder's seem to be in order as far as not being filled. The destination shows up correct through digging for the Media folder in stellarmate, the Picture folder also shows up properly in the pi's file explored and this worked fine prior to this week.

I likely will try formatting my media disk, to see if there might have been some corruption; otherwise I'm really perplexed.

I will update here if the formatting helps.

If there is any other setting that might change itself to cause this I'd be all ears.

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Paul Imm created a new topic ' Image capture is failing' in the forum. 3 weeks ago

This evening I attempted to do some image capturing and the capture is failing no matter what I've tried.

Perhaps the initial issue was that I didn't have my auto ethernet connection hooked to power.

I thought that this would take care of the issue but it still failed.

Every part of my setup is the same as what I've successfully used.  I am getting no connection warnings with my setup.  The INDI Control Panel shows no issues.

Just in case it might break something free I checked to see if there were more updates available; seeing that there was 1 I installed the available update.

Besides actually getting a warning message I am still getting a fail at the download.

 



My USB flash drive is installed in the same USB port.  I can read the drive itself.  The path points to the media drive.

I'm at wits end, any ideas?

 

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Paul Imm replied to the topic 'Starters Guide to ASI294MC Pro' in the forum. 3 months ago

Mike,

I haven't considered using stacked paper for flats.  That will be another idea to try should my grey T-shirt and Light Box method fail.

I have attempted stacking my data without flats once.  What I discovered was that there was a lot of vignetting, otherwise the image was fairly clean looking.

I did give a once over on what Bulrichi wrote.  Even though I don't use PixInsight he had a lot of helpful information.  I am still kind of fuzzy on a lot of the terminology but this article helps.

This evening I took some Flats using my UHC-2 filter.  I think the captured image might help in conveying what to me poses a problem.  This of course is what shows up while in Ekos Capture mode.  I'm assuming that the frame is stretched in the FITS viewer.  It does look totally different upon import on my MacBook Pro.
Mike,

I haven't considered using stacked paper for flats.  That will be another idea to try should my grey T-shirt and Light Box method fail.

I have attempted stacking my data without flats once.  What I discovered was that there was a lot of vignetting, otherwise the image was fairly clean looking.

I did give a once over on what Bulrichi wrote.  Even though I don't use PixInsight he had a lot of helpful information.  I am still kind of fuzzy on a lot of the terminology but this article helps.

This evening I took some Flats using my UHC-2 filter.  I think the captured image might help in conveying what to me poses a problem.  This of course is what shows up while in Ekos Capture mode.  I'm assuming that the frame is stretched in the FITS viewer.  It does look totally different upon import on my MacBook Pro.

  



This shows how inflated the Red values can be.

Since there is such a variance with the ADU values I am wondering whether this would be considered a good flat frame?  If not how would my capture technique need to differ to get this to a better result?

Sorry for invading your tutorial sticky thread.  I am hoping that in getting an understanding of what constitutes a good restricted band flat image that it might be helpful to others with this camera.

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Paul Imm replied to the topic 'Starters Guide to ASI294MC Pro' in the forum. 3 months ago

Hades,

I am making sure that my image train is the same every time that I start an imaging session.  If I take UHC Flats and Dark Flats I follow this with UHC Lights and Darks.

Thank you for your description on how you take Sky Flats.  This certainly is a viable and simple option.  Personally I chose getting a light box as I was aiming for longer flat exposures which I have heard from some that this camera prefers.  At the time I tried Sky Flats I had a 10 second download delay (now this is 2 seconds with PowerLine adapter) with Ekos between 5 second Sky Flats.  By the time the images were completed the ADU variance due to the darkening sky was over 10,000.   Of course a light box carry's it's own set of challenges, such as adding on T-shirts to deaden the light over longer exposures.

The main thing is to stick with what works for you.

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Paul Imm replied to the topic 'Starters Guide to ASI294MC Pro' in the forum. 3 months ago

Hi Mike,

Thank you for replying back.

I am using Astro Pixel Processor for my stacking and Star Tools for the Post Processing.

My biggest struggle is with Flats, if not for this I think I might be getting somewhere.

With my flats I try to be somewhere between 25,000 to 35,000 with the Median ADU.  I purchased a light box to aid in tweaking the numbers.  I know that the combination of longer flats and dark flats should yield better results; for this reason I've not really adopted sky flats as the dusk sky can rapidly change with ADU.  It has been a challenge in getting the flats to stay in an acceptable range.  Normally the issue happens to be that the light from the light box raises the ADU too high even though it is on the lowest setting.  I have been playing around with white T-shirts and acrylic additive to the light box to tone it down a little.  From there I have tried a grey T-shirt, which brought the ADU too low.  From there I experimented with lighter shades of grey T'shirts which I had mixed results.

Recently I tried using an UHC filter that I happened to have.  Now that I think about it, this may have been causing the red cast that I talked about.  I don't know if I ever got a good flat with this.  The red levels were 10,000 above the blue and green.  It's a shame that I couldn't get this to work as it really picked up the Veil Nebula well.

Yesterday I tried out the 50 White Balance that I was glad to find suggested here.

Unfortunately in looking over these flats they were truly flat.  I think with the red value so much higher than the other levels it must just be messed up.

By any chance would anyone know the trick towards getting good flats with UHC or other prominent red filters?

This evening I received a cheap UV/IR filter which I immediately tried out.  I tried a 5 second image.  I was elated to see that red, blue and green ADU numbers were very tight and a very good vignetting and dust mote image preview showed up.  This is within the light range of the light box towards the low side.

I'm hoping to apply this to an imaging session this evening.

Thanks for your help!  I'll feedback whether the UV/IR filter finally achieves what I've been after.

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Paul Imm replied to the topic 'Starters Guide to ASI294MC Pro' in the forum. 3 months ago

This camera is my 1st CMOS style camera and it has been very challenging for me.

I have caught a number of recommendations for the camera which I have been following, but I can't say that I've been successful with the settings yet.

I've followed the recommendation that Spartacus has suggested in regards to 120 Gain and 30 Offset.

I've also heard different things about shooting Flats.  One is that it is recommended to get at least 3 second frames with the Flats.  With the Flats it is recommended to get the same exposure length and settings for Dark Flats instead of Bias Frames.  I've heard that the preferred Median ADU would be a little above 30,000.  These Flats don't have to match the Gain and Offset that the Light and Dark frames are.

I'm struggling with a number of the settings with this camera however such as;
1) My flats with the Median ADU of 35,000 have a red cast to them.  The red value ADU's are typically 10,000 higher than the Median value.
2) I can see where the Red and Blue white balance is adjustable in the INDI Control Panel, but adjusting these values doesn't seem to lower the ADU for red in relation to the other 2 colors.
3) Is there a way of holding the cooler temperature to maintain a minimum temperature value?

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Tonight I tried another set of Flats and noticed that it wouldn't capture again once I set the option to not take images if a temperature wasn't met.

It's possible that this caused the issue the 1st time but it didn't seem so obvious and it should have allowed an occasional image to be taken.

Would it be possible to force the settings to maintain a specific temperature?

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