geoflewis

Here's a revision of the 2nd (WJ stacked) version. I actually reprocessed both images before de-rotating in WJ, dialling back the sharpening to try to hold back the burnt out polar hood, whilst not losing too much detail in the surface detail. Please let me know what you think of this one.

Thanks Kostas, yes, the polar hood is really bright and burnt out. I didn’t notice the colour noise, but I was processing it fairly late last night, so I’ll take another look today and maybe dial it back a bit. I used the same wavelets settings as my revision from 12 Dec, but maybe that is too strong for last nights data. Tricky isn’t it - not enough, too much…. 🤔

Thanks Mark. Yes, the seeing was pretty good, but the image was still frothing on screen, so I was surprised how well the data processed. I think the fast 3ms (330 fps) froze the good frames, allowing me to get this result. I too see that bulge in the polar hood, it may be cloud above the pole. The entire hood is really bright, almost burnt out, despite me running a lower gain than I was earlier in the week. There is also a small peak at the limb in the south west (5 o’clock position), so not sure what that is. Thanks also the feedback on the RH/2nd image looking clearer to you - it justifies the extra work of de-rotating and stacking the 2 images.

I headed out into the cold again earlier this evening for another run at Mars. My initial impressions were that the seeing was similar to the previous night, so I captured a few 6 min SERs instead of 3 mins, so that I would be able to grab a higher number of better frames without having to join them in PIPP. It turned out that the captures were easier to process, so here are a couple of images, the first being best 30k frames from a single SER, the 2nd being 30k frames for 2 consecutive SERs de-rotated in WinJupos so 60k frames in total. WJ measuement corrects the N/S orientation, hence the slight position angle difference. Anyone have a preference one over the other?

An excellent collection and presentation Graham

Thanks Kostas, I’m back out trying again, but seeing is similar to last night, maybe slight worse, with freezing fog forming. Try 6 min captures, but won’t be staying out long tonight.

The seeing was quite challenging this session and boy was it cold outside, so after struggling a while I called it a wrap as I was cold to the core and starting to shiver despite multiple layers from top to toe. I tried several processing methods, including just the individual SERs through AS3!/Registax, combining entire 3 SERs in PIPP (hate this as it turns 18Gb into nearly 50Gb), quality cropping joined 2 and 3 SERs through PIPP, de-rotating these PIPP SERs in WinJupos (these produced horrible ghosting - no idea why), etc, etc. The best I could muster was a best 30k frames in AS3! from a best 50k frames PIPP SER created from two consecutive 3 min SER captures (are you still following me)..... I may have pushed the wavelets too strong on this one, as it looks very noisy to me, so I'll be interested to hear what others think. I think the reality is that the quality just wasn't there in the captured videos.

That's really nice Kostas. I was also out last night, but the seeing was difficult and I've been banging my head all morning trying to squeeze the best i can from a few runs that I got. I'm trying PIPP and de-rotation of SERs in WJ, but they're not playing well for me currently.

That's really good

I think it's more likely to be clouds

Nicely done. I've only imaged Uranus and Neptune a couple of times and not for several years....

Some lovely detail there.

well done

That's lovely

Lovely rework Craig

I've just posted the annotated revision.....

Here's a reprocessed and annotated version of the image that I capture and previously posted. I reprocessed it on the advice a few others who felt I'd left something the table with my original version. Apologies if you've already seen the re-worked version, but I've also annotated it, so here it is again.

So do you think my 65" Sony Bravia OLED would cut it....?

Thanks Kostas, don't you think that anyone interested will have seen the revison here? What most concerned me was that reddish peak on Olympus Mons, which I took to be colour noise being sharpened, but maybe you're right and it's a real feature. There are a couple of other reddish regions that I felt were not real, but artefacts from over sharpening, but if you and others feel the net result is a better image overall, then I'm pleased to go with this version. I sent the annotated revision to Richard McKim, BAA Mars section director and he was also complimentary about the revision.

Thanks Rustang, I appreciate the feedback.

Thanks Kostas, I seem to oscillate between too much sharpening/noise and not enough. I suspect that this may be an adverse consequence of me processing data on a fairly small laptop screen, but I don’t have a larger screen available. I do know that sometimes I’m struggling to see fine detail until I’ve pushed the processing too far.

Thanks Stuart, it's pretty much where I originally had it, but I became concerned that too much noise was coming through, especially in the region around Olympus Mons, so back it right off. It's really good to get your feedback on when to push. a bit harder, so thanks again. I'll update the images I've posted on other sites with this revision.

Thanks Simon, as you'll have noted, I reprocessed it because Sutart @Space Cowboy suggested it had more to give. I was maybe a bit over cautious with the version originally posted.

How about this Stuart..... Quite a bit stronger wavelets used on the left version compared with my original post shown on right for easier comparison. Is it now too much.....? Here's a re-work of a single stack from my data on 10 Dec, so no de-rotation in WinJupos, but given similar treatment to the above revision... It's how I originally processed it, but decided it was too much, so what do you think of it please?

Hmmm, that's interesting. You're making me wonder if I could extract more from the images on 8th and 10th as I feel that the seeing was superior then. Maybe I'll take a look at a single image without putting it through Jupos.