3.2.3. Near-Surface Interface Weights

Near-surface interface weights can be applied to force lateral smoothness in the top few layers of the model. This is done to reduce artifacts related to the high sensitivities of cells near electrodes. Near-surface interface weights are created using the executable program make_wdat.exe. The lines for the input file are as follows:

Line #	Parameter	Description
1	Tensor Mesh	path to tensor mesh
2	Topography	topography
3	nLayer	number of layers
4	Interface weights	w1 w2 w3 …
5	idx	Override topography using idx file

Fig. 3.3 Example input file for creating near surface interface weights ( Download ).

3.2.3.1. Line Descriptions

• Tensor Mesh: file path to the tensor mesh file

• Active Topography Cells: Here, the user can choose to define the surface topography.

  • null: all cells lie below the surface topography

  • topography file: the user supplies the file path to a topography file which has the xyz locations for discrete topography

• nLayer: The number of layers down from the surface that interface weights will be applied.

• Interface weights: From the surface layer down, the user enters the values for the interface weights applied to each layer. For example, if the number of layers is N=4, the user may define this line as 40 20 10 5. Interface weights will take topography into account. And generally, the weight value is decreased exponentially for each layer.

• idx: The user and override the topography file and use an idx formatted topography file instead. This functionality is not relevant to DCIP3D and should be kept as null.