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https://astro.theoj.org/article/159191-vision-based-cnn-prediction-of-sunspot-numbers-from-sdo-hmi-images Vision-Based CNN Prediction of Sunspot Numbers from SDO/HMI Images | Published in The Open Journal... in the open sunspot numbers vision based cnn https://www.ilg.de/SSN-Sunspot-Numbers/Sunspots-Numbers.html ILG Database - Monthly SSN Sunspot-Numbers Monthly SSN Sunspot-Numbers sunspot numbers ilg database monthly ssn