Mode analysis limitations of ECE-I & ECE measurements at the plasma edgeB. Vanovac, S.S. Denk, E. Wolfrum, M. Willensdorfer, W. Suttrop, R. Fischer, N.C. Luhmann and ASDEX Upgrade TeamEPJ Web Conf., 203 (2019) 02011DOI: https://doi.org/10.1051/epjconf/201920302011