Fig. 5

Univariate diagnostics for antenna C1, showing the distribution of signal skewness. Note the distinct positive shift for PD-related classes compared to the negative or near-zero skewness for corona and background signals.

Univariate diagnostics for antenna C1, showing the distribution of signal skewness. Note the distinct positive shift for PD-related classes compared to the negative or near-zero skewness for corona and background signals.