During the period of 1962–1975, the satellite series Orbiting Solar Observatory (OSO-1 to OSO-8) were able to gain extended EUV and X-ray spectrometer observations.
在1962至1975年之間，一系列的軌道太陽天文台（OSO-1至OSO-8）衛星能進行和獲得更長時間的EUV和X射線分光儀觀測資料。