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A/mm absolute magnitude airglow aperture areas and numbers Bappu Bhattacharyya bright Bull Cassegrain Cepheid variable chromospheric Comet component continued correlation Doppler electron flux Fraunhofer line geomagnetic storms GOVERNMENT OF INDIA H-alpha H-alpha dark H-alpha disc heights heliograph hemisphere spot groups homologous India Meteorological Department intensity interferometer ionospheric K-disc and K-prominence K-line K-Prominence spectroheliograms Kavalur KODAIKANAL OBSERVATORY Kubicela line profile Lyot magnetic field magnetometer mean daily areas Meteorological Meudon Observatory mottles N S E W Total N S E W North Dome recorded Nova obtained from Kodaikanal optical Orionis parameters period photoelectric photospheric quasi-periodic oscillations radial velocities radio bursts radio emission radio sources reflector region routine solar observations Seismological Sivaraman slit sodium emission solar chromosphere solar corona Solar Flares solar magnetometer SOLAR PHYSICS solar radio Solar Terrestrial southern hemisphere spectrograph spectroheliograms were obtained spectroscopy sunspot telescope time-sequence spectra Total N S E W Total variations velocity fields