The spikes in frequency fluctuations at different moments from individual telescopes. ((I), (II), (III), and (IV)). Spikes among Hh, Bd, and Zc from TIW. (V) Spikes among Yg from Mars Express (MEX), Hh, Bd, Zc from TIW. ((VI)–(VII)). Spikes among Hh, Zc, Ys, and Mc from TIW. (VIII) Spikes from Hh, Zc, and Mc from TIW.