Should I keep the subs or start afresh

[TrevorW]

I have collected over 6hrs of RGB data on a target problem is the imaging nights where windy (gusts to 20kph) and with average night time temp of around 25C the days where between 36-42C - using the smaller scope 110ED the wind doesn't affect tracking in the Obs, which was around 0.6 RMS average.

[Startrek (Martin)]

Trev,
I review all my subs prior to stacking in ASTAP before discarding any of them . I’ve even kept lowish score subs and found that all data helps improve your SNR. Clear nights are hard to find on the East Coast.
The only subs I discard are ones severely affected by cloud or guiding. I do a visual on each one ( zoomed in to an area of bright and faint stars ) then run them through ASTAP analyse and compare results.Satellite trails are generally looked after by the ASTAP Sigma Clip stacking algorithm but I usually pick up sat trails during my ASTAP review.
Reviewing my subs and correctly vetting them has helped immensely in producing a good stacked image ready for post processing.

Do you review your subs before stacking ?

I think you use Siril ? Doesn’t Siril have a feature to review subs before Stacking ?

I’ve imaged under 30 to 35km/hr westerly winds at my South Coast NSW Obs Dome and subs have been fine. It’s generally the winds and air mass movement at altitude ( eg Jetstream ) that causes more of an issue. Generally when it’s a bit windy , the humidity is lower and subs are fine but Mother Nature has the last say. Obviously you wouldn’t image under 30 to 35km/hr winds without an Obs or some wind break.

Review your subs and determine if they are ok before you discard them as data is hard to gather , well it is in the east.
I can recommend ASTAP ( if free and extremely good plus well supported by the developer Han )

Here’s the link to ASTAP …..,

https://www.hnsky.org/astap.htm

If your interested I can send a procedure for review / analyse and stacking , very easy !

Cheers
Martin

[TrevorW]

PM sent

[astroimagery (Karl)]

When I use Siril for stacking my images I always check the images first by zooming in a little and looking each frame over quickly to make sure it's OK. Then the program runs and if it finds a problem it will reject the image. Sometimes I see something like: 100 images registered and 2 rejected. So there is actually a double check.