Doppler shift measurements on the green coronal line—evidence for largescale macroscopic mass motion

Fabry-Perot interferometric observations on the green coronal line (λ 5303 a) carried out during the total solar eclipse of 1980 February 16 have yielded relative Doppler shift velocities with an accuracy of ± 7 km s-1. The values show a peak in the 30–50 km s-1 range indicating largescale macroscopic mass motion in the solar maximum corona.