Weird noise in inte...
 
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Mar 28 2026 APP 2.0.0-beta40 will be released in 7 days.

It did take a long time to have the work finished on this and it  will have a major performance boost of 30-50% over 2.0.0-beta39 from calibration to integration. We extensively optimized many critical parts of APP. All has been tested to guarantee correct optimizations. Drizzle and image resampling is much faster for instance, those modules have been completely rewritten. Much less memory usage. LNC 2.0 will be released which works much better and faster than LNC in it's current state. And more, all will be added to the release notes in the coming weeks...

Update on the 2.0.0 release & the full manual

We are getting close to the 2.0.0 stable release and the full manual. The manual will soon become available on the website and also in PDF format. Both versions will be identical and once released, will start to follow the APP release cycle and thus will stay up-to-date to the latest APP version.

Once 2.0.0 is released, the price for APP will increase. Owner's license holders will not need to pay an upgrade fee to use 2.0.0, neither do Renter's license holders.

 

Weird noise in integration

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(@tailspin45)
Red Giant
Joined: 5 years ago
Posts: 53
Topic starter  
This is an unprocessed integration. Haven't seen the blotchy red noise and walking noise before. (Enlarge image to see what I mean)
 
Dark, Flat, and Dark Flat calibration. Kappa and LNC enabled, neutralize background and remove amp glow are not. 
 
8" ƒ/5 Newt, ASI294MC Pro (gain 120, temp -10º), L-eXtreme. Best 90% of 140 two-minute pre-screened subs.
 
Will add L-Pro and RGB subs next clear nights if this is salvageable.
 
Mac 13.0.1, APP 2B6

UPDATE: This is M33

M33 RGB session 1 St

I just finished processing NGC 2244 and it came out beautifully

20221125 NGC 2244

Compared meta data on the two integrations and only difference was NGC 2244 used RGB filter. For M33 I deselected Multi-channel/Filter processing.

Redoing M33 with Multi-channel/Filter processing selected. Will report results....still looks awful.

Uploaded a sub if you want to insect it.


This topic was modified 3 years ago 4 times by Tom Harnish

   
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(@Anonymous 174)
Joined: 9 years ago
Posts: 5702
 

Interesting, could you upload the data with the issue? If so, please send like 10 lights per channel and add 10 of each calibration data.



   
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(@tailspin45)
Red Giant
Joined: 5 years ago
Posts: 53
Topic starter  

@vincent-mod Uploaded as requested to tailspin45_RGB_noise.

Accidentally trashed DarkFlat subs, so uploaded Master DarkFlat (also Master Dark and Master Flat which is what I used.)

Just tried calibration with only Dark, no improvement.  With no calibration it looks OK.

M33 no calib RGB crop St

 


This post was modified 3 years ago 4 times by Tom Harnish

   
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(@Anonymous 174)
Joined: 9 years ago
Posts: 5702
 

Thanks, I'll have a closer look tomorrow. Please allow for 2-3 days as we're very busy with preparing a new release. 😉



   
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(@Anonymous 174)
Joined: 9 years ago
Posts: 5702
 

I had a look at the data and I think there is an issue with either the lights or the darks. I see the following message in the console:

10:35:15 - 2) CALIBRATE: Adaptive Data Pedestal raised to:  3.891E-02
10:35:15 - 2) CALIBRATE: because 2665185 pixels are clipping to 0 without it!!!
10:35:15 - 2) CALIBRATE: Adaptive Data Pedestal set at:  3.891E-02
10:35:15 - 2) CALIBRATE: 9 pixels are clipping to 0.

This means that the substraction of the masterdark is causing that many pixels to turn black. It corrects this by raising the pedestal, but this already points to an issue in the workflow.

The masterflat is not applied correctly either with the masterdarkflat it seems. So I think there is something different with the used darks and darkflats maybe, is that the case? It looks like you need either longer exposures or find the issue with the calibration data.

This is the result without calibration data (heavily cropped and corrected) and what you saw as well:

image


   
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(@wvreeven)
Quasar
Joined: 8 years ago
Posts: 2134
 

Adding a question to Vincent's excellent analysis: were all lights and calibration frames shot with the same software?



   
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