Recalculate Derived Data

Use the Recalculate Derived Data option, (geogxnet.dll(Geosoft.GX.IP.RecalculateDerivedData;Run)*), to recalculate the channels that are calculated on import.

Recalculate Derived Data dialog options

Vp channel

The input receiver potential difference channel. It defaults to "Vp" if the channel exists in the database.

Script Parameter: IPRECALC.VP_CHANNEL

Current type

The current can be provided either as a channel (the Channel option) or as a constant (the Constant option).

Script Parameter: IPRECALC.CURRENT_TYPE [1 – channel (default), 0 – value]

Current channel or

Current value

If you selected the channel option above, you will be prompted to provide the channel name. Otherwise, you will be prompted to supply a single current value. If the Vp data has already been normalized to the current, enter a value or 1.

Script Parameter:

IPRECALC.CURRENT_CHANNEL

or

IPRECALC.CURRENT_VALUE

Recalculate N

Check this option to recalculate the pseudo-depth index channel.

  • Available for 2D (in-line and offset) surveys.
  • Script Parameter: IPRECALC.CALCULATE_N [1 – checked (default), 0 – unchecked]

    Recalculate XYZ

    Check this option to recalculate the 3D location of the pseudo-section plot point.

  • Available for 2D (in-line and offset) surveys.
  • Script Parameter: IPRECALC.CALCULATE_XYZ [1 – checked (default), 0 – unchecked]

    Output metal factor channel

    The channel name of the calculated metal factor values. If the channel already exists, it will be overwritten. See Import IP Data for "metal factor"  formula.

  • Leave the field blank if you do not want to recalculate this parameter.
  • Script Parameter: IPRECALC.MF_CHANNEL

    Output average IP channel

    The channel name of the calculated average IP. If the channel already exists, it will be overwritten. See Import IP Data for "Ip_Avg" formula.

  • Leave the field blank if you do not want to recalculate this parameter.
  • Script Parameter: IPRECALC.AVGIP_CHANNEL

    Output apparent resistivity channel

    The channel name of the calculated apparent resistivity values. If the channel exists in the database, it will be overwritten. See Import IP Data for the apparent resistivity formula.

  • Leave the field blank if you do not want to recalculate this parameter.
  • Script Parameter: IPRECALC.APPRES_CHANNEL

    Lines to process

    The database lines to be processed; the options are: the selected lines (the default), the currently displayed line, and all the lines.

    Script Parameter: IPRECALC.LINE_SELECTION [ "A" : All lines, "S" : Selected lines (default), "D" : Displayed line]

    Transmitter 1 & Transmitter 2

    Transmitter 1 is mandatory for all IP configurations. In the Transmitter 1 tab, provide the X, Y channels (for 3D arrays) or the Along-line channel (for 2D arrays).

  • Entering a Z coordinate is optional. Specifying the Across-line channel is also optional.
  • If the configuration supports a second transmitter, proceed to enter the coordinates of Transmitter 2.

    Script Parameters:

    IPRECALC.Tx1X, Tx1Y, Tx1Z

    IPRECALC.Tx2X, Tx2Y, Tx2Z

    Receiver 1 & Receiver 2

    Receiver 1 is mandatory for all IP configurations. In the Receiver 1 tab, provide the X, Y channels (for 3D arrays) or the Along-line channel channel (for 2D arrays).

  • Entering a Z coordinate is optional. Specifying the Across-line channel is also optional.
  • If the configuration supports a second receiver, proceed to enter the coordinates of Receiver 2.

    Script Parameters:

    IPRECALC.Rx1X, Rx1Y, Rx1Z

    IPRECALC.Rx2X, Rx2Y, Rx2Z

    *The GX.NET tools are embedded in the geogxnet.dll file located in the "...\Geosoft\Desktop Applications \bin" folder. If running this GX interactively, bypassing the menu, first change the folder to point to the "bin" directory, then supply the GX.NET tool in the specified format. See the topic Run GX for more details on running a GX.NET interactively.