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Importing IRIS Syscal Bin files

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After starting a new inversion project the import function will be available on the Explorer menu. Select Import Syscal file from the Schedule tree.

 

 

 

 

 

 

 

 


 

The import data file workspace appears and the Quadrapoles button is selected. At the bottom of the frame the IMPORT SYSCAL BIN menu is available.

ImportSyscalFile

Choose the type of import:
- 2D profile imports two-dimensional electrodes arrangements in a single cable based on X or Y electrode positions, depending on the 'start numbering' selection.
- 3D grid expects data collected from surface electrodes arranged as a regular array, in which case a snaking cable is usually employed.

Ignore these commands if you are going to link the imported bin file to the original sequence file (see below).

Click the import Syscal file button to open the Windows command dialog and select the IRIS Syscal bin file with the resistivity and/or IP data-set to import.

A new window appears and two views are available: the "field Data" view for the quadrupoles and data and the Electrodes view for the coordinates of the electrodes.

 

A known issue is that in the Syscal bin format the four electrodes of each quadrupole are expressed in terms of cartesian coordinates and not using the four numbers that identified the electrodes during the acquisition. So for three-dimensional arrangements (in particular for "strange" geometries) the electrodes numbering that ERTLab derives can be different from the one used in the field to acquire the data-set.
This is why a specific command button allows the user to link the bin file to the original sequence file (ElectreII txt format) used to acquire the measurements. By using this option (strongly recommanded) the quadrupoles are re-numbered and the coordinates are attributed to the electrodes in a way consistent with the sequence file.

To import finally the file choose the type of import option in the left part of the Import Data file window and click the OK button:
- New cable option imports electrodes as a new cable (group of electrodes), attributing a progressive number.
- Use Cable nr. (..) option permits to import the data-set by using a group of electrodes (cable) already loaded or to append (if the appropriate checkbox is selected) the current electrodes to an already loaded cable.

For quadrupole arrays using remote poles, the exact location of the reference electrode can be specified by the user in the correspondent text box.

 



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