Sunday, July 26, 2026

Sun on July 25 - HeID3 using FeI

 




Imaging the Sun on July 25the in good conditions. Seeing about 1arcs average, measured using SSM3. Tilt is back in basic condition and below 0,2°.


HeID3 imaged was processed with Inti and started from the FeI line instead of NaID2 line. By doing this a smaller ROI could be used. Scanspeed remained at 16x resulting in a sx/sy of 1,8. To improve I will reduce the speed next time. The HeID line is about -142 pixels away from the FeI line, compared with the NaD2 line which was about -250 pixels. Winning more then 100pixels on data. 

The solar tornado is visible in all lines except MgIB2.
MgIB2 shows finer and sharper details in the active sun which are more blurred in H-alpha, HeID3 and both calcium ion lines. 

Calcium images are processed using Inti and edited with DeNoise AI and AstroSurface: wavelets, local contrast. This way it brings more structure, typically supergranulation.