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Monthly disk-integrated Ca II K emission (EM) index derived from Kodaikanal (8-bit digitization project), NSO/Sacramento Peak and SOLIS/ISS observations (1907- June 2016).
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TwitterCC0 1.0 Universal Public Domain Dedicationhttps://creativecommons.org/publicdomain/zero/1.0/
License information was derived automatically
Monthly disk-integrated Ca II K emission (EM) index derived from Kodaikanal (8-bit digitization project), NSO/Sacramento Peak and SOLIS/ISS observations (1907- June 2016).