Solar dynamic spectra of the analyzed solar radio bursts. (a) Part of the solar dynamic spectrum with the series of the type III solar radio bursts recorded on 22 August 2017 between 09:00:00 UT and 13:59:59 UT by the LOFAR remote station RS210 in LBA band. (b) Solar dynamic spectrum of the three investigated bursts, described as #1, #2, and #3. (c) Solar dynamic spectrum of burst #2 with clearly visible fundamental (F) and harmonic (H) components. (d) Solar dynamic spectrum of burst #3.