High-pass (HPAS)

Use the High-pass option to apply the high-pass filter.

Cutoff wavelength

The cutoff wavelength k₀-1 in ground units. All wavelengths longer than this value are removed.

L(k) = 0	for k < k₀
L(k) = 1	for k ≥ k₀

$image\ebx_-1705891451.jpg$


k	Wavenumber domain increment, used to depict a radially symmetrical variable.	where: np is the number of points cs is the cell size
u	X component in the wavenumber domain.	k = 2π ( i μ+j ν )
v	Y component in the wavenumber domain.
r	Radial component in the wavenumber domain.	also 2πk
θ	Polar component in the wavenumber domain.

Ground_unit is the survey ground units as defined in your grid (e.g. metre or feet). Ground units may be left undefined.