Upper panels: examples of the fiber bursts at 12:01:05–12:01:16 UT (November 23, 1998, left panel) and 8:35:05–8:35:17 UT (November 18, 2003, right panel). Bottom part: corresponding wavelet power spectra showing the tadpoles with the period P = 1.4 s (Table 2). In both spectra, at selected frequencies the times of the tadpoles’ head maxima were determined (t1–t6) and also shown in the upper dynamic radio spectra (upper panels). The tadpole head maxima drift as the fiber bursts.