The frequency fluctuation (FF) and the carrier-to-noise ratio (CNR) of Tianwen-1 (TIW) (a) and MEX (b) from individual telescopes. The FF is shifted by a constant value given in the legend. The CME entered the LASCO-C2 field of view at 07:09. The CME front arrived the projected Mars position around 07:20. The effects of the CME on the signal weaken after 07:32 and fade away after 11:00. In (a), the frequency jumps appear at 08:37:16 and 08:51:12; only at Mc are the radio frequency interferences (RFIs). In (b), an RFI appears at the same time 08:07:23 from Hh, Zc, Bd, Ys, and Mc stations when observing MEX.