Solar Scintillation Monitor

[vineyard]

Hello,

In the unlikely event that someone has an SSM they no longer use, I'd be v interested pls. Want to understand how good or volatile the seeing here is. Must be in excellent condition please.

Thanks & cheers,

Vin

[rsfoto]

Hello,

In the unlikely event that someone has an SSM they no longer use, I'd be v interested pls. Want to understand how good or volatile the seeing here is. Must be in excellent condition please.

Thanks & cheers,

Vin

Hi Vin,

IMHO better save that money for better things and with time you will be able to judge your seeing.

BTW, I process my AVI videos with AviStack 2.0 and there I get a diagramm of how much pixels my details moves and multiplying the pixel value by your image scale you can find out your seeing.

[vineyard]

Thanks Rainer, that's intriguing. I use FC & ImPPG so I wonder if there's a way of extracting that info from there. There is the theoretical convenience of setting up an imaging trigger linked to an SSM reading so that you can go off and do s/t else (like do visual in WL...) but I suppose how often would that happen

Cheers!

[rsfoto]

Hi Vin,

I took 4 videos of past days and ehre the graph I get. By pure coincidence my image scale in H-alpha is 1.001" arcseconds per pixel so the seeing is 1.1 to my pixel deviation.

Then I look where the graph is more dense and so I can make a good guess about my seeing.

For example I would judge seeing for

May 19th a bit <1" or =1"
May 23rd ~1.5"
May 25th ~1" to ~ 1.25"
May 27th ~ 1.25" to ~1.5"

May 19th

Pixel_Seeing_NHSA_20220519.JPG (47.93 KiB) Viewed 1609 times

May 23rd

Pixel_Seeing_NHSA_20220523.JPG (44.16 KiB) Viewed 1609 times

May 25th

Pixel_Seeing_NHSA_20220525.JPG (49.35 KiB) Viewed 1609 times

May 27th

Pixel_Seeing_NHSA_20220527.JPG (46.88 KiB) Viewed 1609 times

[rsfoto]

Thanks Rainer, that's intriguing. I use FC & ImPPG so I wonder if there's a way of extracting that info from there. There is the theoretical convenience of setting up an imaging trigger linked to an SSM reading so that you can go off and do s/t else (like do visual in WL...) but I suppose how often would that happen

Cheers!

Hi Vin,

I do not know but do you really want to have a huge amount of truncated videos with a lot of different amounts of frames ?

I always take 480 frames at a speed of 16 fps and that is it and gives me a time frame os 30 seconds. My experience from many years. eg. since 2008, tells me that 30 seconds in my place is good enough to get the waves of good and bad seeing per video.

Sometimes I take 2 or 3 series of 9 videos and then I decide which series I process.

Look, on May 1st I took two series of 9 videos and then I decided to process the second series as I knew it is better. When I take more then one series in most of the cases I always process the last because I know that was the best.

NHSA_Video_Series.JPG (209.01 KiB) Viewed 1607 times

[vineyard]

That's a really good point about the videos - especially as for close-ups sometimes the image can move as well (and my old laptop creaks with the file sizes anyway).

Its also interesting sitting there next to the equipment (rather than wandering off), b/c I'm noticing the more you do that, the better you can sense when conditions might be improving (at least in your immediate vicinity) based on wind-speed & heat haze etc. I have to get a dark blanket or something like that though so that I can see the screen more sharply.

But for WL I really struggle for some reason - perhaps b/c I'm using an old 4" achromat & maybe the seeing just doesn't support that round here.

Thanks for saving me money!