GROUP

NAME

FUNCTION

Calculation Type

Spatial Convolution

Calculations are performed in the spatial domain, and will take longer, produce clipped profiles for simple geologies but can have less obvious edge effects

Spectral

Calculations are performed in the spectral domain, and will take less time, produce better profiles for simple geologies but can have more obvious edge effects

Full Spatial

Calculations are performed in the spatial domain, and take into account every cube in the model, which makes the calculation very slow, but is the only really accurate means of calculating draped surveys

Spatial Calculations

Calculation Range (m)

In order to limit the extent of the spatial domain calculations a Calculation Range Calculation Range needs to be defined, which serves as a horizontal cut-off distance beyond which the behaviour of the geology is ignored. This number is rounded off to whole numbers of cubes. The larger this value, the more accurate the far field calculation will be.

Variable Cube Size

Cutoff Level

Cutoff height above which cube size as defined by Cube Size parameter takes effect. Select All for constant cube size with depth.

Size Ratio

Ratio of cube size increase below cutoff level

Modelled Data

XYZ

Saves X, Y & Z components of magentic field separately (as .mgx, .mgy and .mgz suffix files)

Spectral Padding

Type

Defines padding scheme used to fill out rock properties in area around calculated geology (See below for details)

Value

Fence & Set Value padding options require specific values (as %) to be entered