Venkatakrishnan, P; Sakurai, T; Suematsu, Y; Ichimoto, K
(Astronomical Society of India, 1997)
Seven sets of spectra in the region of the HeI 1083 nm absorption line of the active region NOAA 7558 + 7562 near the west limb, obtained at Norikura Solar Observatory, National Astronomical Observatory, Japan have been ...