2.5.0 spase://IUGONET/NumericalData/KwasanHidaObs/Ca_heliogram_1 Ca II K full-disk spectroheliograms with photographic plates (level 1) 2016-08-31T10:55:00 Full-disk solar chromospheric spectroheliograms around Ca II K absorption line obtained with the Coelostat spectroheliograph and photographic plates at Kwasan Observatory and Ikoma Observatory. The analogue data were all digitized and they will be open on the web, after some corrections and calibrations. spase://IUGONET/Person/person_general GeneralContact http://www.iugonet.org/meetings/2012-02-22_23/4_2_kitai.pdf Under construction FITS spase://IUGONET/Instrument/KwasanHidaObs/inst_askania ImageIntensity 1926-10-01T00:00:00 1969-08-31T23:59:59 CaK Sun.Chromosphere Spherical HEEQ +90 -90 -90 +90 Reference: FullDisk Sun, Chromosphere, Ca II K, active region, sun spot, plage, filament, solar UV