Upward Continuation (CNUP)

Use the Upward Continuation option to apply an upward continuation filter to your data.

Upward Continuation dialog options

Distance to upward continue

The distance h, in ground units, by which the data is continued upward relative to the observation plane.

Application Notes

Upward continuation is considered a “clean” filter because it introduces very few side effects that would require additional filtering or corrective processing. For this reason, it is commonly used to reduce or suppress the effects of shallow sources and noise in grids.

Data that has been upward continued can also be used in numerical interpretation and modeling programs—an advantage not shared by many other filter types.

Upward Continuation

Where:

h	Distance, in ground units, above the observation plane to which the field is continued.

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.