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Author Topic: Infinity SW stacking issues, 4.2.2.1 core, mono Infinity  (Read 86 times)

scpanish

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Infinity SW stacking issues, 4.2.2.1 core, mono Infinity
« on: March 13, 2019, 05:32:02 AM »
Hi All,

Does anyone have experience with resolving odd failures to stack and 0 FWHM values?  I am generally using SW  with Auto Calc Movement enabled, Add Q disabled, Auto Stack Reset disabled.  There are various issues.  Sometimes FWHM values look normal for this setup (7 to 12) and stacking will proceed for a few frames, then a few "not stacked with good FWHM values", then a few more frames will again stack. If the "not stacked" is caused by image movement, why would stacking resume?  Another scenario is the FWHM value shows as 0, and stacking will still proceed normally (see attached image, stack of 45 sec exposures).  Other times there will be a 0 FWHM value and no stacking will occur.   The general problem is that the SW just doesn't seem to want to stack for no clear reason that is apparent to me.  Unfortunately the SW doesn't seem to have any logs.

Does anyone else see this sort of thing?  Does newer software help?  Just FYI the setup is a C11 on an AP1200 mount, polar alignment isn't perfect but isn't horrible either.  A .fit is available for that image if that is of any use to anyone.

thanks,

Steve

Sirius19

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Re: Infinity SW stacking issues, 4.2.2.1 core, mono Infinity
« Reply #1 on: March 13, 2019, 01:32:18 PM »
Can you post the image of the 0 fwhm image instead of the stack.
I have the osc infinity and have seen fwhm= 0 on cloudy periods.
Keep looking up!

scpanish

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Re: Infinity SW stacking issues, 4.2.2.1 core, mono Infinity
« Reply #2 on: March 14, 2019, 12:01:35 AM »
Hi Sirius19,

The .jpg posted IS the image from a stack of entirely 0 FWHM subframes.  In this case no subframes were "rejected" (after all, 0 is less than the FWHM reject level I had set) and no subframes were eliminated as "not stacked".  So it was one of the lucky captures that worked, in that it created a stacked image.  Although it would likely have been better if the poorer subframes were rejected.  Most of the failures I'm seeing result in either no stack, or a very small stack, and sometimes it also looks like a failure to plate solve (align the images properly).

Did you perhaps mean that you wanted to look at the .fit?  That is too big to post but if you want that give me your email addr and I'll send it to you.

Steve

Sirius19

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Re: Infinity SW stacking issues, 4.2.2.1 core, mono Infinity
« Reply #3 on: March 14, 2019, 02:27:22 AM »
Do you have a delay in the uploading of your files. If you do, you may think the software is stacking a high fwhm, but stacking a previous good fwhm. This will occur when your exposure time is vey fast, like a few seconds and depending on your pc r/ w efficiency.

Keep looking up!

Sirius19

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Re: Infinity SW stacking issues, 4.2.2.1 core, mono Infinity
« Reply #4 on: March 14, 2019, 02:31:43 AM »
Replay the file or session using infinity. It wil shed some light on your issue.
Also, do not stach the images, just look at the fwhm and the image. When an image as a fwhm of zero, pause and save the jpg with everyone.

Trying to help you understand infinity.
Keep looking up!

scpanish

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Re: Infinity SW stacking issues, 4.2.2.1 core, mono Infinity
« Reply #5 on: March 14, 2019, 04:15:07 PM »
Thanks, I appreciate the help!

The exposures are generally long ( 30 to 45 sec ) and the camera has USB 2.0, computer is a very fast gaming laptop with lots of memory.  So I don't think any delay between the camera and the computer can be significant.  As soon as the exposure progress histogram indicates the subframe is finished, I see the FWHM updated.  It does not change until the next subframe.

As you suggested, I'll turn off stacking and catch a 0 frame, that should be interesting.  It happens about 75% of the time so should not be difficult.  I'll try that at the first opportunity, which may be a few days off. 

I'll also look at a replay.

Have you tried the Infinity SW that comes in the new 5 core software? 

Atik, if you are listening....logs!!!  What kind of software lacks logging???

Steve

scpanish

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Re: Infinity SW stacking issues, 4.2.2.1 core, mono Infinity
« Reply #6 on: March 18, 2019, 02:59:56 AM »
I had a short period tonight before clouds moved in.  No FWHM or stacking issue for the one test image I had time for, FWHM numbers were all reasonable.  This was shooting through thin clouds.  I'll try again tomorrow if it is clear.

Steve