PECULIARITIES OF 630.0 AND 557.7 NM EMISSIONS IN THE MAIN IONOSPHERIC TROUGH: MARCH 17, 2015 Journal title: Solar-Terrestrial Physics Authors: Zolotukhina N.A., Polekh N.M., Mikhalev A.V., Beletsky A.B., Podlesny S.V. Subject(s): Physics, Atmospheric Sciences