Thank you for the clear directions. I now know how to handle multiple nights with separate calibration images for each nights. Just one point of clarification about your terminology around flats and dark flats. In your example the darks were shot at the same exposure time as the flats so they should be referred to as flat darks( or dark flats) and they will be used to calibrate your flats. If you want to calibrate your lights with darks those darks need to be the same exposure time as the lights.

Hi! Thanks that explains it nicely. Clear skies!

Thank you for this. Short, concise, easy to understand, and to the point.

Awesome! Thank you!

Awesome video for us who are too lazy to read the manual😅

good as usual

As usual an excellent tutorial Shawn! Thanks for taking the time to explain this feature.

Exactly what I was looking for! Thanks for the strait to the point info on stacking multiple nights in wbpp.

Excellent, Shawn. Great explanation and so simple! Thanks.

This channel is such a good resource. I can't thank you enough!

I just worked through this two days ago. Thank you for the lesson.

Every time I watch your videos, I learn something new! Thank you.

Thank you Shawn for bringing clarity to the subject. Now I can do mulit-night processing with confidence and no fear.

This is grate for those who didn't know this. I've been using this for some time now since most of my images are over 4 or 5 nights. Great feature that was added.

Very clear and helpful video, thanks!

Perfect, great demo again, much appreciated.

Great video once again Shawn. I have been using Pixinsight for quite a while now (your tutorials have been especially helpful👍) but have resisted using WBPP as I am used to using DSS. To improve my astro photos I have accepted that I now have to start doing multi-night projects to get much more data. WBPP can look a little daunting, but this guide makes it look relatively simple. Keep up the good work!🙂

Perfect timing for this! I have 3 nights of data I want to run thru wbpp. Thanks.

Thanks for this Shawn!!

Great little nugget of knowledge, recently started to gather data from multiple nights by just adding lights from multiple dates using one set of calibration frames. I somehow seem to get away with it just fine, but I attribute that to luck. So this is a welcome addition! Nicely done, man.

Thanks, that is exactly what I needed to know...perfect timing 😀

Thanks for another easy to follow very informative presentation

Great video Shawn, I was one of the viewers asking for this video after your other wbpp video. I managed to work it out myself but do it slightly differently to this. Each night I have separate folders with ‘session01, session02 etc’.

Given how complex PI is this was a nice easy tutorial. Thanks 🙏

great tip! thanks

great video and straight to the point

Another great tutorial Shawn

Thanks Shawn another great video clear skies 🔭🍻

That’s extremely useful, thanks.

I always appreciate your videos. Lean, practical and to the point. Just curious: You mentioned a student provided the data. What do you teach?

Very nice video 🔥

Nice video, thanks

Damn! That was easier than I thought it would be! Thanks!

Excellent video (again)!! You make it simple and easy to understand (I did request, but not sure if you were referring to me or not - I like to flatter myself!). It failed miserably the first time (& always in the past). This time I didn’t realize that I needed to but the _ in the directory file name: M82 Nite1 vs. M82_Nite1. I just ran 6 nights and all worked well (Actually, the first time, I left the room with less than five minutes to go and when I came back into the room, my cat sat on my computer keyboard and completely shutdown PI!😮).

PI just keeps getting better.

freeeking Genius

So much to learn

Thanks!

Thanks again for another great video! I had a hell of a time finding one which explained this in easy to understand terms...Working like a charm..! If I use different filters, on my OSC will WBPP see these as well?

Hmm, maybe they've updated the script, but the last time I tried that, it wasn't working for me. My directories are named in the YYYYMMDD format. I also have separate subdirectories for flats and flat darks. I wish there was a dialog window, like in APP, where you can assign a session name to the files.

So I had been using Groups but I couldn’t seem to get it to work for folders only file names! Thanks for this.

Great video! Is there a way to manually separate the subs into groups in WBPP? Reason I ask is because I do my darks and bias seasonally and have an operate directory with masters I make of each, so I don't keep them with the lights and flats.

Hi Shawn. I have yet to combine multi-nights of data and I will use this the first chance I get. Thanks!

Hi Shawn, can you tell me what are the 'rules' for combining multiple nights of data? I.e., do I need to have used the same camera, same telescope, same exposure length, same BIN, same filters, etc. or can they be different and Pixinsight will know what to do? Mike

Hey Shawn, could you please make a video about how to combine a mosaic in Pixinsight in 2023? There is a good Tool PhotometricMosaic but I never really understood it. Would really appreciate a tutorial from you 🙂

Ok, so i just did my first big mono narrowband project. I thought id get two decent nights but ended up with SEVEN. So each night i shot one or maybe two filters. I did an autofocus every hour. So multiple filters had multiple focus settings. I have a Moonlite focuser with no backlash so i was able to take a set of flats for each set of lights with different focus settings.... I assume i can use my dark and bias frames with everything because i have a ZWO ASI1600mm Pro cooled camera. So do i just make each filter with its own focus setting specific flats as a different "night"? I ended up with well over 30 hours worth of total exposure. The target is NGC6960 veil nebula. I shot Ha, Oiii and Sii. I also shot Luminance for 2 hours with an hour each of red, green and blue to be used for stars. My narrowband subs are all 5 minites each. Luminance is 2 minutes and RGB are 1 minute each. Any thoughts are appreciated. Can make all the data available if you want to make a video out of it that i can follow along with ....

Pretty good - Thank You Question- i know have 3 rigs (different ZWO cameras). If they all shoot the same target, can i combine like this in WBPP? And, what i used filters on 2 rigs and not on 3rd rig, can i stack in WBPP? Thank You

Is this needed when you use a cooled astro cam?

Hi Shawn, Thanks for another great instructional video. I have tried this in multiple ways: 1) WBPP each night to integration, Star align the integrated images and combine with either Image integration (sometimes I have to use 2 images of each integrated night since image integration requires at least 3 images) or Pixel Math. In Pixel math, I can weight each integrated image (especially if one night is done with a filter and another night is done without a filter. 2)throw all lights into WBPP and my latest night of flats and run. So far pretty lucky with this approach as far as flats go. Sometimes it's clear which final version is better, other times I can't tell the difference. My question to you is; do you have a preference or do you see an inherent problem with any of these methods that I may be overlooking? I really like the way you used flats from each night since I was worried about my method using only the last night of flats (lucky so far). This can easily be incorporated into any method above. Thanks again for you thoughts and your timely instructional videos. Dan Dall'Olmo

hello, I have a photo session in broadband and two in narrowband, how do you advise me to behave? sum of photos with wnpp per session and single master, is it equivalent to a hdr or are there better methods to exploit all the data collected? Thank you

Best I can assume that this is very useful if there is a long time span between the recording nights: but if I shoot for 4 nights in a row and make my Flats- darks and flat darks on the last night this is not going to affect the end result or am I wrong about it.

Firstly night1 and night 2 came together total 11 photos for integration but after ı tried to use gear sembol and separate them , now again click gear icon but never integrate again all images …. how can I fix this problem … you click night 1 and night 2 and gear sembol …. hooop again multiple night data and result one frame …. ı got 2 frames :(((

Thanks for the valuable information, the only thing I would like to get some clarification on is drizzle data, will I be able to combine all the drizzle files into a one single file? Again thanks for the video, regards.

Super helpful, Shawn. Thank you! Curious how you’d use this is this scenario: you have one set of flats for your first night of hydrogen, and another set of flats for all other nights of hydrogen.

Nice. I figured this was possible but never put the time in to figure it out. Can it so hand multi night multi filters ?

Gday Shawn Great to see more tutorials Mate I actually have a question. I currently run a Askar FRA 400 ( FL 400mm ) with ZWO 533MC, Cheryl has scope with FL 450mm with ZWO 533 MC also. If we both imaged same object at same night using same filters & Cameras, can you use both sets of data to creat final image? Hope this makes sense Cheers mate

Any chance you could start posting content on Rumble? Everyone I know is leaving KZfaq

what if they were different scopes?

This would only be needed if you move something in your image train wouldn't it? I shoot multiple targets over multiple nights and WPPP does a great job.