Translations:Dictionary:F-k domain/3/en

FIG. F-11. f,k plot. (a) The region passed by array, frequency, and velocity filters is cross-hatched. Radial lines through the origin represent constant apparent velocity V_a (V_a=f/k=ω/κ). (b) Data beyond the Nyquist wavenumber f_N (determined by discrete spatial sampling) wraps around (aliases) and may get mixed up with the signal. In wraparound, data to the right of +k_N continues rightward from –k_N, where K_N is the Nyquist wavenumber.