Figure 7
(a) Magnitude \({\varvec{\beta}}_{{\varvec{m}}}\) and (b) phase \(\phi_{{\varvec{m}}}\) values determined by applying the GPSA to the data in Fig. 6, for \({\varvec{N}}\) in the range 3–20. For each value of \({\varvec{N}}\) there exists multiple possible subsets of phase sampling points corresponding to differing positions of the \({\varvec{N}}\) points along the fringe, each of which yield a different pair \({\varvec{\beta}}_{{\varvec{m}}}\) and \(\phi_{{\varvec{m}}}\) values. Also shown (dotted lines) are the ‘true’ values of magnitude and phase as determined from the fit shown in Fig. 6.
