Wave-Height Mapping From Second-Order Harmonic Peaks of Wide-Beam HF Radar Backscatter Spectra. - Tian, Zhen; Tian, Yingwei; Wen, Biyang; Wang, Sijie; Zhao, Jiurui; Huang, Weimin; Gill, Eric W. (IEEE Trans. Geosci. Remote. Sens., 2020)