Case study of July 11, 2020: Spectrograms of several wave parameters computed on the ground from the continuous waveforms, for the same time interval and frequency range as in Fig. 1. From top to bottom: total power of magnetic (PB) and electric (PE) field fluctuations measured, degree of polarization (DOP), wave ellipticity (ellip), wave normal vector components (n_X, n_Y, n_Z) in SRF, angle between the wave normal vector (n), and the DC magnetic field vector (B₀), radial SRF X-component of the Poynting vector (S_​X) as the real part of the complex Poynting flux , argument of , signed phase velocity ω/K₁ (along n) estimated from the complex number , and argument of . See text for more details.