Thursday, January 18, 2018

20180118 Sun, tweaking parameters of ASI 120mm

Seeing rather bad at 3/10, transparency very low with pollutant at 3/10.

Got some more time to tweak the settings of the ASI 120mm camera.  I never really studied enough for this little camera, today I switched on the high speed mode, and adjusted Turbo USB to 100 and I finally got more than 30 fps!  Silly me.

I should have adjusted the gain but I forgot what values did I set.

The first one was taken with my usual setting, at slower frame rate, taken at 0703 (UT).

After tweaking, taken at 0710 (UT) at more than 30 fps (around 32-34 fps), and gain lowered.

I found the contrast slightly better, less noise, etc.  The higher frame rate should freeze the seeing better.

Sharpcap kept the record rather well, gain was reduced from 50 to 40... I believe it could be driven down a bit further.

Thursday, January 11, 2018

20180111 Sun

Day off today and the cold front is still passing, and it turns sunny today.

Poor seeing is expected and thus no fine detail could be resolved, taken at 0639 UT.

There are a few dim filaments around, with an interesting on on top right hand corner, which extends a bit into the dark space as a small hedgerow.

Too lazy to add false color to this relatively featureless one, just a record.

Wednesday, December 20, 2017

20171220 Sun

Got a short break today, took a snapshot under poor seeing.

0753 (UT)

Monday, December 11, 2017

20171211 Sun

Winter means poor transparency due to the wind from mainland, and it usually means poor seeing with sharp temperature changes.

0550 (UT), no fine detail could be seen.

0552 (UT), push up exposure to show the prominence.

Friday, December 08, 2017

20171208 Sun

Seeing no good again, temperature is dropping since yesterday night so it accounts for the poor seeing.  The solar disc is kind of featureless too.

0631 (UT)

Monday, December 04, 2017

20171204 Sun

0617 (UT), extremely poor seeing, dare not to further process after this stacked wavelett processed version.  Just a record.

Friday, November 17, 2017

20171117 Sun

Seeing bad, transparency 4/10.

0617 (UT), there might be a small active region forming at the right near the center, but the most interesting feature is the filament at the 3 O'clock position and it extends beyond the solar disc as a prominence.  Not very big, however.