Fig. 10

a Estimated space vibration modes \(\widetilde{{{\varvec{\Phi }}}}^{\text {est}}_i\) (1–2–3) shown here projected along the x direction, c Imposed space vibration modes (actually its boxed mesh approximation) \(\widetilde{{{\varvec{\Phi }}}_i}^{\text {vib}}\) (1–2–3) also projected along the x direction and b comparison between the 1500 measured and ground truth amplitudes. For this comparison, the space functions were normalized and plotted with the same color scale and the sign of the space functions was chosen to be the same. The x-component was arbitrarily selected to illustrate this comparison, but the y or z components show a similar proximity