Gaussian Regional/Residual (GAUS)

Use the Gaussian Regional/Residual option to apply a Gaussian regional-residual filter.

Gaussian Regional/Residual Filter dialog options

Cutoff wavelength

The cutoff wavelength k₀^-1 is the central wavelength of the regional-residual Gaussian filter. Note that he function amplitude at this point is only 0.39.

Low pass (regional)

High pass (residual)

Select whether the output should be the regional component (default) or the residual component.

Application Notes

The Gaussian filter is a smooth filter commonly used for low-pass or high-pass applications.

Gaussian Regional/Residual Filter

Where:

k₀	Cutoff central wavelength of the roll-off.

Wavenumber Domain Variable Definitions


The following variables are used in the wavenumber domain:
k	Wavenumber increment, used to depict a radially symmetrical variable.	Where: np: number of points cs: cell size
μ	X-component of the wavenumber.
v	Y-component of the wavenumber.
r	Radial component of the wavenumber.
θ	Angular (polar) component of the wavenumber.

Ground unit refers to the survey ground units defined in your grid (e.g., metres or feet). Ground units may be left undefined.