Fig. 3From: Planetary-scale MLT waves diagnosed through multi-station methods: a reviewImplementation of the HR &WT method on synthetic data. a Same plot as Fig. 2b but with four more dashed lines representing more randomly selected longitudes. b–h) the wave amplitudes estimated through the HR &WT method using the data sampled on the seven dashed lines in b, as detailed in “Harmonic regression plus wavelet transformation (HR & WT) approaches” sectionBack to article page