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MultiLoop III - Tutorial 1. Running an existing model. Graphic Manipulators. MultiLoop III Menu Bar. Pick Pan Zoom Rotate Viewing Illumination. MultiLoop III Graphic Window. Step 1: Start MultiLoop III. Double click on the MultiLoop III Icon

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MultiLoop III - Tutorial 1

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multiloop iii tutorial 1

MultiLoop III - Tutorial 1

Running an existing model

step 1 start multiloop iii



MultiLoop III Menu Bar







MultiLoop III Graphic Window

Step 1: Start MultiLoop III
  • Double click on the MultiLoop III Icon
  • The graphic window and a splash screen will appear
  • Click on the splash screen
  • A “New Model” dialogue will appear
  • Select the coordinate system
  • Go.

Splash Screen

Select the azimuth sign convention

Select the coordinate


Specify the azimuth

Click OK

When done

step 2 open a mlp file

Select the file

Navigate to recent places and up

the file tree here

Change the view to alternate between the

hierarchy and sorted names here

Click “Open” when done

From the File Menu, Select open

Step 2: Open a .mlp file
  • .mlp files store MultiLoop models
  • From the File menu, select open
  • From the Open File dialogue, select a file
  • In this case, HalfPlanecoef1511.mlp is used
  • Go…
step 3 model opens

Data are plotted

in “stacked profile”

format along the


Letters after the

line labels refer

to the coordinate

The line is drawn

& annotated

here in blue

Reference axes



label of the

plotted data



Step 3: Model Opens
  • When the file is opened, the model is displayed
  • The mesh can be viewed in “mesh” or “tile” view
  • Keys “b”,”s” control the tile sizes
  • Keys “l”,”r”,”u”,”d”,”i”,”o” control the view
  • Arrow keys control panning
  • Go….

The mesh is shown as tiles. Tile colour variation indicates variable resistance

step 4 compute a response

From the Calculate menu, select Response

Step 4: Compute a response
  • From the Calculate menu, select Response
  • This starts the computation. A text output window records the progress of the calculation
  • Initially, the mesh is parsed. The resistive and inductive limits are found, then a time step solution in found
  • The profile response is then computed, and the data are plotted
  • Go…
step 5 calculating

Inductance calculations

Messages from the geometric


Geometric summary of the mesh

Primary field, Inductive, Resistive Limits




per step

Time step



per step

Latest step


Rate of change in the

stream potential

Step 5: Calculating

Text Output Window

(may be the console)

Basis function generation

Inductance calculations

step 7 write out data

The File



Select the file name to write

To export to a file, select Write Data

Select the



Step 7: Write out data
  • Data can be output to a Geosoft style ASCII file
  • Select the Exports Menu, then Write Data
  • A file dialogue will appear, select the file to create
  • There is only simulated data in this session; you will be asked whether to write out transformed data.
  • Answer No, Transforms will be covered later
  • Go….

Select yes to write the calculated data to

the file. Transforms will be explained later.

Transforms allow the data to be transformed

before writing.

  • An ASCII file with the data has been created.
  • This file can be opened with an a text editor such as TextEdit, BBEdit or WordPad
  • The file data can be imported into programs such as OasisMontaj and MultiLoop III