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River channels often have little variation in frequency within the channel whereas the variation in frequency have larger variation.
Instantaneous Frequency
Rate of change of the Instantaneous Phase: ωC=dφ/dt.
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Relationships between the Instantanenous Frequency (center frequency), Dominat Frequency (RMS frequency) and the Instantaneous Bandwidth (spectral bandwidth). From "Instantaneous spectral bandwidth and dominant frequency with applications to seismic reflection data" by Arthur E. Barnes. .
Other Trace Attributes
Iso-Frequency
The value of the amplitude spectrum at a specific frequency calculated by as Short Time Fourier Transform.
User-defined Function