Gravity Earth (GFILT)

Use the Gravity Earth option to apply a gravity earth filter.

Gravity Earth Filter dialog options

Depth to top of layer	Specify the depth to the top of the layer, in ground units.
Depth to bottom of layer	Specify the depth to the bottom of layer, in ground units.

Application Notes

Use the Gravity Earth filter to calculate the gravitational field of the horizontal earth layer located between two user-defined depths. This filter is designed for use with GM-SYS.

When r = 0:

Where:

G	Gravitational constant.
z1	Depth to the top of the density layer, in ground units, of the earth. Must be positive for layers above the calculation level.
z2	Depth to the bottom of the density layer, in ground units, of the earth. Must be positive for layers above the calculation level.

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.

Reference