An Atlas of Spectroheliograms from 3641 to 6600 Å

We announce the release of a new atlas containing over 50,000 full-disk solar spectroheliograms, covering a broad wavelength range from 3641–6600 Å. The data was acquired using amateur instruments (Sol’Ex and ML Astro SHG 700), achieving an average spatial resolution of 2.5″/pixel, and is accessible via an interactive online platform.

Research note describing the atlas: here
The atlas website: here