TIDs. The author derived its maximum amplitude $\theta_m\simeq5\cdot10^4f^{-2}$, where $\theta_m$ in arc min, $f$ in MHz. It is seen that $\theta_m$ decreases with increasing frequency. The SCs examined above are all observed above 35 MHz. This frequency can be selected to obtain the upper limit of deviations introduced by TIDs. At 35 MHz, the deviation is about 41 arc mins that is comparable to the pixel size ($45^\prime\times45^\prime$) of dTEC map. Therefore, we conclude that the IPP coordinates can only be slightly affected with deviations smaller than the spatial resolution of TIDs in the considered cases.

Summary and Discussion {#Sect:Summary and Discussion}
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In this study, for the first time we provided strong observational evidence of cause-effect relationship between pairs of TIDs and SCs. In all examined cases, the performed timing analysis allowed us to reveal the couplings between MSTIDs and SCs with great confidence. We showed that the observed peculiarities of the spatial structure of TIDs on dTEC maps were consistent with the time-frequency characteristics of the corresponding SCs in the spectrograms. In addition, the study settled a controversy about the origin of SCs in the solar radio records, which may be mistakenly attributed to the Sun. If so, 