Influence of density fluctuations on the O–X mode conversion and on microwave propagation A. Köhn, T. Williams, R. Vann, E. Holzhauer, J. Leddy, M. O’Brien and M. Ramisch EPJ Web of Conferences, 87 (2015) 01003 Published online: 12 March 2015 DOI: 10.1051/epjconf/20158701003