Today I caught some clear sky in the Ersatz-Obsi, so the spectroheliograph got to work. For the ImageMath scripts (JSol’Ex) see this previous post.
He I D3 concept
the iron line, used as a guide, the bright diagonal lines are artefacts
the raw Helium I D3 disk
a designated continuum, an average of nearby wavelengths with no significant lines
normalized delta, raw line minus continuum
the Helium prime image (see script for naming convention)
some math (log), shows some proms and clouds
exaggerated signal
stack of 75 individual scans, emphasized signal
processed, mono
processed, color
