Normalised Particle Positions

The second form of the START command defines normalised particle positions:

FX

The normalised amplitude for mode 1 [1]:

PHIX

The phase for mode 1 [1]: $\phi_x = - \arctan(p_{xn}/x_n) / 2 \pi$,

FY

The normalised amplitude for mode 2 [1]:

PHIY

The phase for mode 2 [1]: $\phi_y = - \arctan(p_{yn}/y_n) / 2 \pi$,

FT

The normalised amplitude for mode 3 [1]:

PHIT

The phase for mode 3 [1]: $\phi_t = + \arctan(p_{tn}/t_n) / 2 \pi$,