Fig. 5

Evaluation indices in the period of 101 s using the data observed at site 163 from 00:00 on October 29 to 00:00 on November 4. a–d Show the variation in PD(\({{\varvec{E}}}_{x}\), \({{\varvec{H}}}_{x}\)), PD(\({{\varvec{E}}}_{x}\), \({{\varvec{H}}}_{y}\)), PD(\({{\varvec{E}}}_{y}\), \({{\varvec{H}}}_{x}\)), and PD(\({{\varvec{E}}}_{y}\), \({{\varvec{H}}}_{y}\)); e shows the variation in polarization direction for the magnetic field; and panel (f) shows the variation in the normalized hat matrix's diagonal element. The data in red correspond to the leverage point, whose hat matrix diagonal element exceeds the expected value (2/N)