With the usual setup, from the Ersatz-Obsi, I imaged the Sun in He I D3. A stack of 96 spectroheliograms (scans).
Again, the coronal hole, as a large scale feature, is readily visible.
Processing scripts are here.
With the usual setup, from the Ersatz-Obsi, I imaged the Sun in He I D3. A stack of 96 spectroheliograms (scans).
Again, the coronal hole, as a large scale feature, is readily visible.
Processing scripts are here.

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