The azimuthally-averaged power spectra of various components of the vz inversions using travel times averaged over 4 days. Compare with Fig. 7 for vx inversions. Notice that in the case of containing the cross-talk at 1 Mm depth, the excess in power around kR⊙ ~ 150 is not caused by the random noise, but by the bias coming from the cross-talk (not plotted separately). In the other two cases the random noise is a main cause why these inversions are not possible.
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