Figure 8

(a) Maximum magnitude error \({\varvec{e}}_{{{\varvec{A}},{\mathbf{max}}}} = \max \left\{ {\left| {\left( {\frac{{{\varvec{\beta}}_{{\varvec{m}}} - {\varvec{\beta}}}}{{\varvec{\beta}}}} \right)} \right|} \right\}\) calculated from the magnitude values \({\varvec{\beta}}_{{\varvec{m}}}\) determined from the GPSA (shown in Fig. 7) and expressed as a percentage error relative to the magnitude \({\varvec{\beta}}\) determined from the fit shown in Fig. 6; (b) maximum phase error \({\varvec{e}}_{{\phi ,{\mathbf{max}}}} = \max \left\{ {\left| {\phi_{{\varvec{m}}} - \phi } \right|} \right\}\) calculated from the phase values \(\phi_{{\varvec{m}}}\) determined from the GPSA (shown in Fig. 7) and the phase \(\phi\) determined from the fit shown in Fig. 6.