Snapshot captured by RPW on 2022 September 22, at 14:05:04 UT. (a) Waveform of the two electric field components E_z (blue) and E_y (red) in the SRF frame. (b) Hodograms E_y(E_z) calculated within equidistant time windows of 0.7 ms. (c), (d) Wavelet spectrograms of the electric energy ∣E(f, t)∣² in the high- and low-frequency ranges, i.e., 52 ≤ f ≤ 53.8 kHz and f ≤ 0.7 kHz, respectively. (e) Wavelet spectrogram of the magnetic energy ∣B(f, t)∣², in the same frequency range as (c). (c)-(e) The color bars are in logarithmic scales. (f)–(i) Power spectra of E_z (blue), E_y (red), and cB (green), respectively. Zoomed-in views are presented, in linear scales, in the ranges of 52 ≤ f ≤ 53.8 kHz (g), (h) and f ≤ 0.7 kHz (i). (h), (i) Linear scales; the black curve represents the spectrum of ∣E∣². The dashed vertical lines correspond to peaks at ﹩{f}_{2}\simeq 52.86﹩ kHz and f₁ ≃ 53.05 kHz (g), (h), and at ﹩{f}_{1}^{{\prime} }\simeq 0.18﹩ kHz (i). Spectra in (f)–(i) are calculated in the time interval of 0 ≤ t ≤ 62 ms.