Frequency domain filtering and processing




Frequency domain filtering and processing:
Note: append a plus + after the last command parameter to indicate that another frequency domain process follows. SG2K will then not performs the redundant inverse FFT and forward FFT between the two processes.

bandpass: bp bu|amp [n <num_poles>] [co <low_freq> <high_freq>]

highpass: hp bu|amp [n <num_poles>] [co <low_freq>]

lowpass: lp bu|amp [n <num_poles>] [co <high_freq>]

gaussian: gau [fcent <cent_freq>] [alpha <alpha>]

integrate: fint

differentiate: fdif

hilbert: hil

envelope: env
attenuation: ratt
removes frequency dependent attenuation using t* along ray path. Requires that GSARC and DEPTH header variables are set
and that a TauP model is available (see Phases Toolbar and -taup.* arguments)
see also program argument freq.rattenuation.fmax

transfer: trans [from <response>] [to <response>] [freq <f0> <f1> <f2> <f3>]

convolve: con [master <index>] [type CONVOLUTION | DECONVOLUTION] [ref <masterRefTime>] [wa <waterLevel>]