how to f-k filter

Hi, I have time-space data from several stations in a linear array. I want to look at the data in the frequency-wavenumber (f-k) domain so I can filter out some of the signal, as velocities that overlap in the time-space domain are distinct in f-k domain. I know I need to preform a double Fourier transform, filter the data and do the inverse transform. I can do this with something like, real(ifft2(fft2(data)*F)) where F is the filter matrix. However I am not sure what form the data should take. Since it comes from an array do I need to stack the data or preform above operation on each element in the array?? thanks

Answer 1

[Rick Rosson]

The variable data should be an array of size M rows by N columns. Each row should represent a different time increment, and each column should represent a different location in the linear array. The time increments and the locations in the linear array must be uniformly spaced.

HTH.

[David Craig]

thanks

[cao jianfwng]

if I want to remove the signal when the wave number equals to k = 0，how can I choose the form of F?