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Prosys II

Prosys II

Help PROSYS II software Help I. INTRODUCTION II. PRESENTATION III. DOWNLOAD III.1. From a Syscal V9…V12 / Elrec T III.2. From a Syscal Junior / R1+ 2 Channels III.3. From a Syscal Kid / G-Ohm III.4. From a Syscal Kid Switch III.5. From an Elrec 6 / Elrec6-20Ip III.6. From an Elrec 10 III.7. From a Syscal Pro / Elrec Pro / Elrec Lite III.8. From a Pro via modem III.9. From a Ps2 IV. IMPORT IV.1. "Txt" file IV.2. "Csv" file IV.3. Electre (version 1) file IV.4. GPS file V. VISUALIZATION V.1. Numeric display V.2. Graphic display VI. DATA PRESENTATION VII. PROCESSING VII.1. Modify spacing VII.2. Add data files VII.3. Compare data files (time lapse) VII.4. Split in files VII.5. Filter VII.6. Automatic filter VII.7. Average VII.8. Reject VII-9. Despike VII.10. Insert topography VII.11. Change electrode array VII.12. Exchange marine cable VII.13. Cole-Cole parameters VII.14. Adjust X,Z along GPS track VII.15. Adjust GPS position of midpoint VII.16. Create and use a Batch file VII.17. Modify In value VII.18. Exterminate bad data point VII.19. Reverse Polarity VII.20. Swap Coordinates VII.21. IP Filtering compensation VIII. EXPORT VIII.1. Spreadsheet VIII.2. Spreadsheet Sounding VIII.3. Winsev interface VIII.4. Resix/Resix IP VIII.5. Ix1d/Ix1d IP VIII.6. Geosoft VIII.7. Export to Surfer VIII.8. Export to 2D or 3D interpretation VIII.8.1. Res2dinv VIII.8.2. Res3dinv VIII.9. GPS track mapping VIII.10. View GPS track in Google Earth VIII.11. View waypoint in Google Earth

Help

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Prosys II

I- Introduction

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I- Introduction Designed by IRIS Instruments, Prosys II is the data managing software for the Syscal and Elrec type units. The minimum PC configuration recommended to run the Prosys II program is the following one: - Pentium microprocessor (1 GHz) - Windows Xp - RAM memory: greater than 512 Mb - 1024 * 768 resolution screen - 1 serial or USB port for communication Note: The decimal symbol defined by windows must be the "." (dot) And not the "," (comma). This has to be specified from the "Regional parameters" of Windows. For the data transfer, the connection to the resistivity-meter is done by a serial link (RS232) or a USB cable (note that the "File|USB check" menu allows to check, in case of doubts, the right operating of the USB port). In case of USB communication, use only the USB link with the driver specifically designed by IRIS instruments (the driver has to be installed before connecting the cable so as the software recognizes the USB link). The units compatible with this software are the following ones - Syscal Junior / Junior Switch - Syscal R1+ / R1+ Switch - Syscal Junior / Junior Switch 2 Channels - Syscal R1+ / R1+ Switch 2 Channels - Syscal R2 - Elrec T - Syscal Kid / Kid Switch - Syscal Pro / Pro Switch - G-ohm - Elrec Lite - Elrec 10 - Elrec Pro / Pro Switch - Elrec 2 - Elrec 6 (standard and 20 IP windows version) - Ps2 The Prosys II software allows to transfer data files acquired in standard mode or in Multi-Electrode mode.

Prosys II

II- Presentation

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II- Presentation Once the installation is completed, run the program double-clicking on the "Prosys" icon created or on the "Prosys.exe" file present in the installation directory. The master window of the software will appear then: This one shows a menu bar with a few shortcut buttons and a window in which the data will be displayed.

Note: You can choose to display only the parameters you wish, for a clearer view ; this has to be done by the "File|Display options" menu: the following window will appear:

Then, you have just click on the column header of the parameter to validate/un-validate it, and click on "Ok" to validate your choice.

Prosys II

III- Download

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III- Download To transfer the data from the memory of a resistivity-meter, select first the connection port by the " Communication|Communication port" menu.: - Com (RS-232 port (COM 1 by default)) - USB (in case of IRIS Instruments USB / Serial converter cable) - BT (Bluetooth mode (for the next generation of Syscal units)) - WiConnect (for a Wi-Fi download with a specific accessory (WICONNECT) Then select the "Communication|Data download" menu or the

button.

In that menu, the following options are available: - From a Syscal V9…V12 / Elrec T resistivity-meter (EPROM version 9++): 1 reception channel units - From a Syscal R2 / Junior / R1+ 2/4 Channels: 2/4 reception channels units - From a Syscal Kid / G-Ohm - From a Syscal Kid Switch - From an Elrec 6 / Elrec 6-20Ip - From an Elrec 10 - From a Syscal Pro / Elrec Pro / Elrec Lite - From a Syscal Pro / Elrec Pro via modem - From a Ps2 Remark: If a communication problem occurs, the warning message "download error" will appear on the screen: check then the communication port specified, the baud rate and the procedure.

Prosys II

III- Download

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III-1 From a Syscal V9...V12 / Elrec T In that option, one can download data in standard mode or in Multi-Electrode mode. In standard mode, the following window will appear:

One has then to select the data (number and type(s)) to transfer: - Introduce the first data point number to transfer - Introduce the last data point number to transfer (max. #818) - Select the electrode array(s) you wish to transfer Then, click on the "Download" button: The message indicating the procedure to follow on the resistivity-meter will appear then:

Then click on "Ok". At the end of the transfer, the program asks you for saving the data in a binary file ("bin" extension). In Multi-Electrode mode, the data that can be downloaded have to be acquired according to a sequence file uploaded from the Electre software. A message indicating the procedure to follow will appear. Note: At the end of the transfer, if the sequence ("*.ele" file created from Electre II) corresponding to your data file is present in the "ElectreII/Syscal" directory, the program will ask you directly for saving the data in a file with the name of the sequence and with the binary format ("*.bin" file). If not, the program will ask you to specify first the Electre II sequence ("*.ele" file) before offering to save the data.

Prosys II

III- Download

III-2 From a Syscal R2 / Junior / R1+ 2/4 Channels In that option, the following window will appear:

.

- Data to download: Introduce the first data point number to transfer (First #) (min. #0) Introduce the last data point number to transfer (Last #) (max. #44826) - Baud rate You can select a lower baud rate that the by-default one (high), depending on your PC capabilities. Then, click on the "Download" button: The messages indicating the procedure to follow will appear then:

Then click on "Ok". At the end of the transfer, the program asks you for saving the data in a binary file ("bin" extension). In case of WIFI connection by the WICONNECT module: You can connect to the Syscal defined as an access point or using a WIFI network:

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Prosys II

In case of using a WIFI network: Connect your PC to the WIFI Enter the password or your WIFI network Then, from the below widow, select "Wifi Access" and enter the IP adress:

III- Download

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Prosys II

III- Download

III-3 From a Syscal Kid / G-Ohm In that option, the following windows will appear:

Follow the procedure on the Syscal Kid/G-Ohm, then click on "Ok". At the end of the transfer, the program asks you for saving the data in a binary file ("bin" extension). Then, the data will be automatically displayed in the master window of Prosys II.

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Prosys II

III- Download

III-4 From a Syscal Kid Switch In that option, the following windows will appear:

Follow the procedure on the Syscal Kid Switch, then click on "Ok". At the end of the transfer, the program asks you for saving the data in a binary file ("bin" extension). Then, the data will be automatically displayed in the master window of Prosys II.

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Prosys II

III- Download

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III-5 From an Elrec 6 / Elrec 6 - 20Ip In that option, the following window will appear:

One has then to select the data (number and type(s)) to transfer: - Introduce the first data point number to transfer - Introduce the last data point number to transfer (max. #2500) - Select the electrode array(s) you wish to transfer Then, click on the "Download" button: The message indicating the procedure to follow on the Elrec 6 receiver will appear then:

Then click on "Ok". At the end of the transfer, the program asks you for saving the data in a binary file ("bin" extension). Note: Data can also be downloaded from the specific version of the Elrec 6 (20 IP slices instead of the standard 10 IP slices) using the "Communication|Data download|Elrec 6–20IP" menu

Prosys II

III- Download

III-6 From an Elrec 10 In that option, the following windows will appear:

Then, one has just to follow the procedure. At the end of the transfer, the program ask you for saving the data in a binary file ("bin" extension).

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Prosys II

III- Download

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III-7 From a Syscal Pro / Elrec Pro / Elrec Lite In that option, the following window will appear:

- Data to download: Introduce the first data point number to transfer (First #) (min. #0) Introduce the last data point number to transfer (Last #) (max. #44826 for the recent versions) - Baud rate You can select a lower baud rate that the by-default one (high), depending on your PC capabilities. Then, click on the "Download" button: The messages indicating the procedure to follow in the unit will appear then:

Then click on "Ok". At the end of the transfer, the program asks you for saving the data in a binary file ("bin" extension). In case of WIFI connection by the WICONNECT module (to be connected to the front panel serial port (Com1) of the unit): You can connect to the Syscal defined as an access point or using a WIFI network:

Prosys II

In case of using a WIFI network: Connect your PC to the WIFI Enter the password or your WIFI network Then, from the below widow, select "Wifi Access" and enter the IP adress:

III- Download

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Prosys II

III- Download

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III-8 From a Syscal Pro / Elrec Pro via modem This option allows to download by modem, data stored in a Syscal Pro or Elrec Pro unit. Then, first one has to choose the communication port of the desktop modem by the "Communication|Modem port" menu. Then, select the "Communication|Data download" menu or the option:

button and select the "Pro via modem"

The "phone book" window will appear then, from which you’ll have to dial the number to call:

Prosys II

III- Download

III-9 From a Ps2 In that option, the following windows will appear:

Follow the procedure on the Ps2 unit, then click on "Ok". At the end of the transfer, the program asks you for saving the data in a binary file ("bin" extension). Then, the data will be automatically displayed in the master window of Prosys II.

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Prosys II

IV- Visualization

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IV- Visualization Once a data transfer (or a import) has been done, the data will be displayed in the master window of Prosys II: The data will be, first, displayed numerically. One has also the possibility to display the data graphically. From that function, one has the opportunity to get a picture of the apparent resistivities section. If an IP measurement has been performed, we’ll be able also to display the apparent chargeabilities section and also, the IP curve of each data point. For the Syscal Pro/Elrec Pro units only, one can also display the Sp pseudo-section.

Prosys II

IV- Visualization

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IV-1 Numeric display

The data are listed line per line with the following structure (some of the parameters are specific to some operating modes or units): - Data point number (corresponding to the memory zone of the resistivity-meter) - Electrode array - Spa. 1/4: four spacing parameters (X) (corresponding to the electrode array – in m) - Rho: resistivity value (in Ohm.m) - Dev: standard deviation (quality factor, in %) - M: global chargeability value (induced polarization parameter (in mV/V – "=0" if only-resistivity data)) - Sp: spontaneous polarization (measured just before the injection, in mV) - Vp: measured primary voltage (in mV) - In: injected current intensity (in mA) In=9999.99 mA stored in case of insufficient Tx battery level - Time: injection time (pulse duration, in s) - Spa. 5/12: other spacing parameters (in m) (Y (3D) and Z (elevation or borehole)) - M1/M20: partial chargeability values (induced polarization window (in mV/V – "=0" if only-resistivity data)) - Mdly: delay time before the chargeability measurement (in ms) - T_M1/T_M20: duration of the partial chargeability windows (in ms) - Stack: number of stacks performed - Rs-Check: grounding resistance value of the reception dipole (in kOhm) - Vab: injected voltage (in V) - Pab: generated power (in W) - Rab: grounding resistance value of the injection dipole (in kOhm) - Latitude: given by a GPS - Longitude: given by a GPS - Name: file name stored in the memory of the unit - Channel: channel # - Overload: overvoltage in reception ("1" for overload data) - Tx bat: battery level used for the transmitter - Rx bat: battery level used for the receiver - Temp: internal temperature (in °C)

Prosys II

IV- Visualization

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- Date: storage date/time - Gapfiller: additional quadripole for optimization ("1" for gapfiller quadripole) - Synch: synchronization channel - Cole Tau: cole-cole parameter for the IP curve (time constant) - Cole M: cole-cole parameter for the IP curve (global chargeability) - Cole rms: cole-cole parameter for the IP curve (error) Note: Note that the number of data points is indicated in the left bottom part of the window ; the directory in which you are working in is indicated at the right bottom part of the window. Remark: By the master window, a small box at the head of each line allows to un-validate/validate (thanks to a mouse-click with the left button) the corresponding measuring point (then, these data won’t be taken into account in the further data presentation (Cf. §.VI), processing (Cf. §.VII) and export (Cf. §.VIII)). This can be useful, if for example, you wish to skip some data points appearing erroneous or not sufficiently stable. For example, in the following master window, the data point #44 has been un-validated due to a standard deviation ("Dev") judged too high:

Prosys II

IV- Visualization

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IV-2 Graphic display One can also visualize the results, graphically, in various ways: - By levels of investigation (clicking on the parameter you wish, in the master window). In the following example, the "Rho" column has been clicked to obtain the curves of apparent resistivity, level by level, versus the midpoint:

Notes: - This graphical window can be printed or saved as a "bmp" file (buttons in the bottom left corner of the window) - For the profile lines: A left click on a line allows to visualize the corresponding level and the spacing XA - XB - XM - XN A left double-click on a line allows to put it bold (some successive right click on a line allows to put it gradually in bold) - For the X and Y axis: A click on an axis allows to specify the min. and max. value to display

- By pseudo section. (by the "View|Rho pseudo section" menu):

Prosys II

IV- Visualization

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From that window, one can: - modify the "min" and "max" value of the color scale to highlight some specific range of resistivity values (use the cursors and click on "Apply") - display the pseudo-section with the topography (in case of Z columns (spa9-10-11-12) filled) ("topography" box to validate) - display the different parallel sections, clicking on the corresponding Y value box (below the "topography" box) - print directly this picture thanks to the "Print" button. - Export the picture to a classical image format. Notes: - If some Y lines are present (3D array, Gradiant array, parallel 2D added profiles), it will be possible to visualize the data in X/Y, for each depth level, by the "View|XY section" menu and the data can be then displayed, level by level. - The Sp pseudo section can be also displayed by the " View|SP pseudo section" menu .- If a chargeability measurement has been performed, one can visualize the IP pseudo section thanks to the "View|IP pseudo section" menu. Moreover, in that case, the "View|View IP windows" menu allows to visualize the IP curve of the highlighted data point.

Prosys II

IV- Visualization

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About soundings: - The "Sounding " menu allows to display the sounding curve, corresponding to the highlighted data point (apparent resistivity variation in depth at a specific X location)

- The "View|View multi sounding" menu allows to dispaly the Rho data points in a scatter plot (Rho values versus Report point) This can be printed to a "bmp" file.

Prosys II

IV- Visualization

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IV-3 Nodes position This function allows to visualize the position of the electrodes in X and Y coordinates (current electrodes in red and reception electrodes in blue):

Clicking on a line in the data set allows to highlight the corresponding electrodes.

Prosys II

V- Import

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V- Import Several type of files can be imported from Prosys II software: For that, select the "File|Import file" or the "File|Import Electre file" menu. - Import a "txt" file - Import a "csv" file - Import an Electre (version 1) file - Import a GPS file Note that you can also open ("File|Open" menu) some files that have been downloaded by the IRIS SDCARD reader. The possible extensions are: - .pro : data downloaded from a Syscal Pro unit - .r1m: data downloaded from a Syscal Junior/R1+ unit, in multi-electrode mode - r1r: data downloaded from a Syscal Junior/R1+ unit, in standard mode Prosys II will automatically create the "bin" files corresponding to the various files present in the memory of the SD card.

Prosys II

V- Import

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V-1 "Txt" file The Prosys II software allows to import data files transferred by the old DOS data transfer software of IRIS Instruments . The "File|Import file" menu will ask you to select the ".txt" file to open. The following window will be then displayed:

Automatically, the program will check and display in the right area of the window the relations between the parameters of the file and those used by Prosys II. Depending on the type and the Eprom version of your unit, the relations found by the software may not be correct: in that case, you can select a parameter (clicking on the line) to change it by a new destination field in Prosys II.

Prosys II

V- Import

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- Specify first the electrode array used in your data file (by default, the electrode array will be "Mixed/Non conventional", which is a general array). Then, - Use the "Create" button to export the ".txt" file to ".bin" file Automatically, the ".bin" file will be created in the same directory that the ".txt" file, keeping the same filename, and will be displayed in the master window of Prosys II: - by the menu bar of Prosys II, select the "Processing|Transform spacing" menu to be able to process (insert topography,…) and then, export data to interpretation software. Note: by the "Advanced" button, the following area will be displayed:

From that section, you can clear the current field mapping by the "Clear mapping" button (the "Auto-map fields" will load anew the standard mapping). After definition of a field mapping, you can save it ("Save map profile" button) to be able to load it for another file ("Open map profile" button). The saved map profile will be located in the "Map" subdirectory and will have the "map" extension.

Prosys II

V- Import

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V-2 "Csv" file The Prosys II software allows to import some data files created by Excel software (".csv" format). This can be useful if you need to process a modified "bin" data file ; the procedure is in that case: - Export a "bin" data file to spreadsheet (with a comma or a semi comma as separator) - Modify the exported file ("csv" extension) from Excel software - Save the file with a ".csv" format. The "File|Import file" menu will ask you to select the ".csv" file to open. The following window will be then displayed:

Then, select the parameters to be applied to each destination field in Prosys II (automatically, some of the parameters will be automatically recognized):

Prosys II

V- Import

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Then, - Specify first the electrode array used in your data file (by default, the electrode array will be "Mixed/Non conventional", which is a general array). - Use the "Create" button to export the ".csv" file to ".bin" file Automatically, the ".bin" file will be created in the same directory that the ".csv" file, keeping the same filename, and will be displayed in the master window of Prosys II:

Prosys II

V- Import

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V-3 Electre (version 1) file The Prosys II software allows to import data files transferred by the Electre software (version 1). After having introduced the name of the Electre data file ("0xx" extension) by the "File|Import Electre file" menu, the following window will appear:

You have now to select the right electrode array in the list. Concerning the array type, the files imported from Electre version 1 are processed as general (Mixed/non-conventional) array. The array you select in the list will be the sub-array (Cf. §. VIII.7.1. for the structure of a mixed/non-conventional array). Once the data have been imported, you can save the file with the Prosys II format using the "File|Save as" menu or the button ; introduce then a filename with a "bin" extension (binary format). If you quit the program without saving the data, a warning message will appear. Note: The Electre II program can be run from the software thanks to the "Tools|Run Electre" menu. The first time you’ll use this function, you’ll have to specify the destination path of the "ElectreII.exe" file ; and then, in the future, the selection of this command will run automatically the program.

Prosys II

V-4 GPS file Prosys II allows to import GPS information into a "bin" data file. Possible GPS data files extensions: "trk" ; "gpx" ; "pcx5" or "kml" (Google Earth).

V- Import

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Prosys II

VI- Data presentation

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VI- Data presentation Once a file has been transferred or imported or a ".bin" file opened (by the "File|Open" menu or by the button), one can visualize the data in the "Formated" way. This option, reached by the "View|Formated" menu, allows to present the data in a very detailed file containing the results together with the set-up parameters: Example of a formated file (with a file directly downloaded to Prosys II):

Example of a formated file (with a file imported from Electre version 1):

Prosys II

VI- Data presentation

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In that "Report" window, one has the possibility to realize the following actions (this text editor works in the same way that any standard text editor): - Change the font by the

button.

- Save this report in a file name having a ".txt" or a "rtf" extension (in a directory you’ll specify), by the this file will be then able to be open in the software thanks to the "View|File" menu. - Print directly this report (

button ;

button): this action will call the standard printer configuration window.

Remarks: - If some data have been un-validated or filtered from the original file, they won’t be present in this data presentation. - You can also add some comments to a data file thanks to the "View|Edit comments" menu (or by the window will appear:

At this stage, in this "Report" window, you’ll have to save this comment thanks to the

button.

button). The "Report"

Prosys II

VII- Processing

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VII- Processing The Prosys II software allows to process data in various ways. Once a data file is open in the master window, one can perform the following actions: - Keep or ignore some selected points ("Processing|Advanced|Keep - Ignore selected data" menu) and then select "Processing|Advanced|Delete ignored data" menu to erase them definitively. Note that the selection of some data points can be inverted by the Processing|Advanced |Invert selection" menu: this will swap the points between validated/un-validated status. - Show the results in absolute Rho value ("Processing|Absolute Rho value" menu). - Modify spacing - Add data files - Compare data files (time lapse) - Split in files - Filter the data manually - Filter the data in an automatic way - Apply a data averaging - Reject some points - Despike - Insert the topography - Change the electrode array - Exchange marine cable - Compute the Cole-Cole parameters - Adjust X, Z along GPS track - Adjust GPS position of midpoint - Create and use a batch file - Modify In value - Exterminate bad data point - Reverse polarity - Swap coordinates - Process IP data

Prosys II

VII- Processing

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VII-1 Modify spacing The "Processing|Modify spacing" menu allows to introduce, for the spacing parameter(s) you wish (depending on your field configuration), an increment value ("Increment" function) or a multiplication value ("Multiply" function).

So, for example, for a 3D processing, modify the "Spa(5)", "Spa(6)", "Spa(7)", "Spa(8)" (that corresponds to the Y position of the A, B, M, N electrodes) introducing the distance between the first line and the parallel profile. By default, the apparent resistivity values will be recomputed accounting the new spacing ("Recompute Rho" box validated). Note that you can apply this modification from a specific location along the profile (validate the "From" box, and enter the position from which the function has to be applied). After that, save this new data file as a ".bin" file by the "File|Save as" menu. Notes: - For the Syscal Kid / Syscal Kid Switch and for "standard mode (sounding)" data, the definition of the spacing parameters is different than the one used by the software ; so, before performing this operation, the "Processing| Transform spacing XYZ" menu has to be selected. - The "Processing|Replace node spacing" menu can be used in case of a modification of a coordinate of an electrode if, for example, it was not strictly along a straight line ; cross the "Recomputed Rho" box after modification.

Prosys II

VII- Processing

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VII-2 Add data files The Prosys II software allows to add several data files. The function is done by the "File|Add" menu. The procedure is the following one: - open a data file ("File|Open" option) - select the "File|Add" option - and select the file you wish to add to the first one Then, the two files will be displayed in the same array (the first measuring point of the second data file being placed after the last measuring point of the first one). Notes: - You can add as many files you wish (the maximum number of data points managed by Prosys II being 64 000). - This option can be used in the following cases: Add several data set obtained with various types of electrode arrays: in that case, the interpretation software will manage the data as a general mixed array. Add some roll along sequences with a standard one so as to run an interpretation of the full data set. Add several parallel profiles Before adding some data files, it can be necessary to apply a shift of specific spacing(s) in a file in order to be compatible with your field configuration (for example, in case of acquisition of various parallel profiles and you want to create one single pseudo 3D data set): to do that, the "Processing|Modify spacing" function has to be used.

Prosys II

VII- Processing

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VII-3 Compare data files (time lapse) The Prosys II software allows to compare two data files. This is particulary useful in case of time lapse monitoring measurements. The function is done by the "File|Time lapse (%)" menu. The procedure is the following one: - open a data file ("File|Open" option) - select the "File|Time lapse (%)" option - and select the file you wish to compare with the first one In that new data set: "Rho" column = Apparent resistivity variation (in %) = (Rho data file 1 - Rho data file 2 / Rho data file 1) * 100 Then, the corresponding graphic will show the % of variation between the resistivities of the two data sets along the common profile.

Note: After that process, the other main parameters column will be set to "0".

Prosys II

VII- Processing

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VII-4 Split in files Only for the Syscal Pro/Elrec Pro unit: A filename can be entered in the memory of the unit and so it will be stored into the ".bin" file. And, if the data download has been done in one time and that several filenames are present into the memory of the unit, it will be possible to split the downloaded file in several files. This has to be done by the "File|Split in files" menu. Then, enter the directory in which the various ".bin" files will be stored. The structure of these data files will be the following one: "[Filename_First data point number].bin".

Prosys II

VII- Processing

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VII-5 Filter The Prosys II software allows to ignore some data points in regards to a specific parameter ("Vp", "In", "Rho", "Dev" or "M"). This has to be done by the "Processing|Filtering|Value" menu ; the following window will appears:

In that window, the minimum and maximum values for the main parameters are displayed. You can then limit the range, introducing an higher minimum value or a lower higher value depending on the data points you suspected to be erroneous. In case of optimized measurements (with the Pro unit) it can exist positive and negative sign voltage values: it's the reason why there's the possibility to filter the Vp parameter with the absolute value. You can filter the data according to several parameters in the same time. Then click on "Ok" to validate your choice: the data points involved by the filtering will be automatically un-validated. Remark: You can definitively erase the datum points un-validated, using the "Processing|Delete ignored data" menu ; and save the modifications in a new ".bin" file.

Prosys II

VII- Processing

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VII-6 Automatic filter The Prosys II software allows to run an automatic filtering by the "Processing|Automatic Filtering " menu. This option allows to filter the data in a classical way (it contains, by default, some rejection threshold for the main parameters, and some lateral data smoothing (by an averaging on a user specified distance). So, this filtering can be used in most of any standard cases. This option uses the parameters of the "Filter.ini" file present in the Prosys II directory. Structure of the "Filter.ini" file, showing the by-default values: [Filter] VMin=-15001 VMax=15001 Imin=0.5 IMax=99998 Rhomin=0.100000001490116 RhoMax=20000 DevMax=20 Mmin=0 MMax=120 [Median] NbSpacing=1 [Slide] NbSpacing=0.5 [RejectOverload] Execute=1

(minimum reception voltage value allowed) (maximum reception voltage value allowed) (minimum injection current value allowed) (maximum injection current value allowed) (minimum resistivity value value allowed) (maximum resistivity value value allowed) (maximum deviation factor value allowed) (minimum chargeability value allowed) (maximum chargeability value allowed) (median average) (sliding average) (1=overload data rejected)

The values are the default ones ; so, this file can be modified, if you want to apply, in an automatic way, some other filtering parameters.

Prosys II

VII- Processing

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VII-7 Average By the "Processing|Filtering|Sliding average" menu , one can apply a filter allowing to realize a sliding average on data: By the "Processing|Filtering|Median average" menu , one can apply a filter allowing to realize a median average on data.

One has first to enter the "Sliding distance" in meters: this is the distance on which the average will be applied. By default, the value offered is: 2*min. spacing Then, one can select the level(s) on which the filter has to be applied. This possibility allows to adapt the distance, on which the average will be done, for each depth level as for example in dipole-dipole array, it may exist an higher noise level for the deepest levels of investigation (so using an higher sliding distance may be relevant for these levels). The "Vp" and "Rho" parameters will be so automatically re-computed after validation. Remark: This option can be particularly useful for data set acquired in a continuous survey (dynamic) mode as the contact of the electrodes may be sometimes poor and so an average can be generally relevant.

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VII-8 Reject Specific filters can also be done by Prosys II Software: - The "Processing|Advanced|Reject node" can be used in case of trouble with some electrode(s) ; consequently, the data points with that electrode(s) in their quadripole will be un-validated The X,Y,Z position of the electrode(s) have to be entered ; you can reject several nodes in a same time entering the position of the first electrode to the last one - The "Processing|Advanced|Select level" menu allows to select some level(s) to reject (consequently, the corresponding data point will be un-validated in the data set) - For the data files containing several Y lines (3D arrays or successive 2D added profiles) the "Processing|Select Y location" menu allows to select the Y lines to reject (consequently, the corresponding data point will be un-validated in the data set). - The "Processing|Advanced|Select window location" allows to specify a X range to keep (the data outside this range will be automatically un-validated). For the Syscal Pro/Elrec Pro units only: - The "Processing|Advanced|Reject overload data" menu can be used to filter some overload data (max. reception voltage values allowed by the unit) - The "Processing|Reject gapfiller" menu allows to reject the quadripoles that have been added while the creation of the sequence to make possible an optimized multi-channel measurement (it can be useful to reject these data points as for example in case of optimized pole-pole sequence, the gapfiller quadripoles will be in pole-dipole configuration). - The "Processing|Advanced|Select channel" menu allows, in case of trouble on a channel, to select some channel(s) to reject (consequently, the corresponding data point will be un-validated in the data set)

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VII-9 Despike The "Processing|Filtering|Despike" function allows to attenuate some peaks that can be considered as erroneous data points. A data value is determined to be a spike when the ratio of its value and both of its surrounding neighbors (at the same depth level) exceeds the despike factor. The user has to set also the distance to test for identifying data spikes. By default, the despike factor is set at 1.25 and the distance on which is applied the test is 2 times the minimum spacing.

The spike values are replaced by linearly interpolating the neighboring values.

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VII-10 Insert topography The insertion of the topography (manually or by a GPS file) can be done by the "Processing|Insert topography" menu. The following window will appear:

In that window, the electrodes are defined by a X-Y pair of coordinates. This option allows then to introduce a Z coordinate for each of these electrodes. To fill the "Z spacing" column, three possibilities are offered: - Manually : introduce for each electrode their position in Z An interpolation function allows to define easier your topographic model.: enter a value of a Z spacing for a first electrode and a value of a Z spacing for a second electrode and click on the "Interpolation" button: the interpolation will be automatically applied between these two points. - Inserting a "txt" file (by the "Load Txt file" button) Following structure to respect: #,X,Y,Z 1,0.00,0.00,0.2 2,5.00,0.00,0.3 3,10.00,0.00,0.3 ... - Inserting a GPS file : by the "Insert GPS data" button, one can import a track file with coordinates information ; after selection of the GPS file ("trk", "gpx", "pcx5" or "kml" (Google Earth) file), one will reach the following window:

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By default, the first electrode in the file is considered as being the reference electrode and the last one, as being the electrode for the direction.

Then, for the reference electrode and the one showing the direction, select by the "Browse" button, the corresponding geographical position of the electrode in the array:

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If you let the by-default selection, select in the GPS file the first line for the reference electrode and the last one for the electrode showing the direction.

Then, click on "Ok" button: the topography will be then automatically displayed: You can make a zoom in that graphical window, thanks to the left button of the mouse (defining the area moving the mouse towards the right and keeping the finger on the left button) ; you can un-zoom, clicking on the left button of the mouse and moving the mouse towards the left. Of course, the apparent resistivity can be recomputed, crossing the "Recompute Rho" box. Note: For the Syscal Kid / Syscal Kid Switch and for "standard mode" data, the definition of the spacing parameters is different than the one used by the software ; so, before performing this operation, the "Processing|Transform spacing XYZ" menu has to be used.

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VII-11 Change electrode array If a sequence has been manually created, when the data are downloaded from the unit to Prosys II software, the electrode array will be "Mixed/non conventional" (for 2D sequence) or "Other" (for 3D sequence). So, it can be relevant, before exporting the data, to change the electrode array, by the "Processing|Change EL. Array" menu. And this option can be particularly useful in those cases: - for data acquired in borehole : change in that case the current electrode array by the array called "Hole Surf." before exporting the data to Res2dinv / Res3dinv software. - for data measured from a sequence created manually: change the current electrode array (which is "Mixed/Non conventional") by the correct array before exporting the data to Geosoft. - in case of marine survey, if the electrodes at the bottom of the water layer (not floating electrodes), change the electrode array by "Underwater nodes".

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VII-12 Exchange marine cable In case of errors of the spacing introduced in the initialization file ("ini") of the Sysmar program (dynamic marine survey), you can change after acquisition the position of the electrodes. The procedure is the following one: - open the marine data set ("bin" file) - select the "Processing|Advanced |Exchange marine cable" menu - select the new "ini" file (that has been previously created by the "SysmarIni.exe" program present in the Sysmar directory) corresponding to the right cable The parameters of the "ini" file will be applied to the "bin" file and so the "spacing" and so the "resistivity" parameters will be updated.

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VII-13 Compute Cole-Cole parameters If IP (chargeability) measurements have been performed, one has the possibility to compute the Cole-Cole parameters (spectral parameters): This option is reached by the "Processing|Advanced|Compute Cole-Cole parameters" menu. These parameters are the following ones: - Cole Tau - Cole M - Cole rms For this computation, the measured decay curves are compared to a set of Cole-Cole theoretical curves. These curves are pre-calculated for a c-value of 0.25 (c: exponent applied to Cole Tau) and for a Tau-value from 10 ms to 100 s. So, the "Cole Tau" parameter shown in the results is the one corresponding to the curve allowing the best fit. The "Cole M" parameter is then calculated. Legend: Cole Tau: Time constant Cole M: True chargeability: Cole M = Vs/Vp with Vs = secondary voltage: voltage just after a current turn OFF Vp = primary voltage: voltage just before a current turn OFF Cole rms: Value that quantifies the quality of the fit between the measured decay curve and the theoretical one chosen. To visualize these parameters, don’t forget to validate the corresponding columns by the "File|Display options" menu. Note: For a correct computation of these parameters, one advise that at least 10 IP slices have been used to compute the global chargeability and that the voltage reception levels are sufficient (and high relatively to the noise)

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VII-14 Adjust X, Z along GPS track This option can be used : - In case of a static measurement performed accounting a GPS data recording (available with the Syscal Pro/Elrec Pro unit), This can be useful for example, for the Roll along process as the GPS data will be recorded at the beginning of each sequence of measurement. So, if several roll along measurements have been performed with the same sequence, this option can be used to transform the latitude and longitude parameters recorded, in meters to get a precise location of the measurements.

- In case of dynamic measurement, if the acquisition as not been done along a straight line. After selecting that option ("Processing|Advanced|Adjust X, Z along GPS track"), you will have just to enter a distance (length to split the track) so as to compute the right spacing precisely. It’s also possible to visualize in Prosys II the GPS track (Latitude versus Longitude), by the "View|Gps track" menu.

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VII-15 Adjust GPS position of midpoint In case of measurement performed in a dynamic way with GPS data recording (available with the Syscal Pro unit), by this option, one has the possibility to adjust the GPS position so as to apply the correct GPS position to each quadripole mid point. After selecting that option ("Processing|Advanced|Adjust GPS position of midpoint"), you will have just to enter the X position of the GPS ("0" by default, if the positions of the takeout of the cable are referred to the back of the boat, and if the GPS is located at the back of the boat)

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VII-16 Create and use a batch file The software allows to create a user specified batch file containing a set of processing functions. The functions offered are the same than the ones offered manually by the menus. This is especially useful in case of you have several data files on which you want to apply the same processing. The batch file, called "Batch.ini" by default, has the following structure: [ElArray] Change=0 Dispo=10 [RejectOverload] Execute=0 [TransformSpacing] Execute=0 [AbsoluteRhoValue] Execute=0 [AutomaticFilter] Execute=0 [FilterValue] Execute=0 VMin=-15001 VMax=15001 Imin=0.5 IMax=100000 Rhomin=0.001 RhoMax=20000 DevMax=20 Mmin=0 MMax=120 [IncrementSpacing1] Execute=0 X1=0 X2=0 X3=0 X4=0 Y1=0 Y2=0 Y3=0 Y4=0 Z1=0 Z2=0 Z3=0 Z4=0 RecomputeRho=0

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[MultiplySpacing2] Execute=0 X1=1 X2=1 X3=1 X4=1 Y1=1 Y2=1 Y3=1 Y4=1 Z1=1 Z2=1 Z3=1 Z4=1 RecomputeRho=0 [IncrementSpacing3] Execute=0 X1=0 X2=0 X3=0 X4=0 Y1=0 Y2=0 Y3=0 Y4=0 Z1=0 Z2=0 Z3=0 Z4=0 RecomputeRho=0 [MultiplySpacing4] Execute=0 X1=1 X2=1 X3=1 X4=1 Y1=1 Y2=1 Y3=1 Y4=1 Z1=1 Z2=1 Z3=1 Z4=1 RecomputeRho=0 [RejectNode] Execute=0 Xfrom=999999 Yfrom=999999 Zfrom=999999 Xto=999999 Yto=999999 Zto=999999

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[ReplaceNodeSpacing] Execute=0 X=0 Y=0 Z=0 Xby=0 Yby=0 Zby=0 RecomputeRho=0 [RejectLevel] Execute=0 Level_a=0 Level_b=0 Level_c=0 Level_d=0 Level_e=0 Level_f=0 Level_g=0 Level_h=0 [RejectChannel] Execute=0 Channel_a=0 Channel_b=0 Channel_c=0 Channel_d=0 Channel_e=0 Channel_f=0 Channel_g=0 Channel_h=0 [AdjustGpsPosition] Execute=0 XGps=0 [SaveFile] Execute=1 DeleteIgnoredData=1 AddName=_Batch Note: - About the structure, note that for each item, the Execute line has to be changed from "0" to "1" so as to apply the command. For example, if you want to apply a filter to your data, you can fill the [FilterValue] item in that way: … [FilterValue] Execute=1 VMin=-15001 VMax=15001 Imin=1 IMax=100000 Rhomin=1 RhoMax=2000 DevMax=5 Mmin=0 MMax=120 …

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VII-17 Modify In value It's possible to modify the value of the injected current by this function ("Processing|Advanced|Modify In value") This can be useful in case of using our "low current" module (option of the Syscal Pro) used to generate some very low current keeping an high resolution. Indeed in that case, as the resolution is multiplied by "100", it will be necessary to multiply the "In" value by "0.01" so as to have the right value for the current and so consequently, the resistivity.

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VII-18 Exterminate bad data point The "Processing|Exterminate bad data point" option displays the data points in a scatter plot of Rho versus Report point for the whole file. This filtering option is based on the rejection of some data points out of a trend.

To run the filter, click on the

button - Several clicks can be done to be more and more restrictive (note that you

can go back to the previous level of rejection clicking on the

button).

The data points to be rejected will be then plotted in "red" color. Then, click on "Ok" if you agree with the selection of data points to be rejected: In the data file, the exterminated data points will be just un-validated - You can delete them after, by the "Processing|Advanced|Delete ignored data" menu If not, click on the "Quit" button to skip that function. Picture can be saved as a "bmp" file by the "Save" button or can be directly printed ("Print" button).

1-2-3-4" and "Spa 5-6-7-8" columns). The "Processing|Advanced|Swap A-B spacing" option allows to swap the X and Y coordinates of A and B

(swapping the "Spa 1-2" and "Spa 5-6" columns). Prosys II VII- Processing 56 The "Processing|Advanced|Swap M-N spacing" option allows to swap the X and Y coordinates (swapping the

"Spa 3-4" and "Spa 7-8" columns).

VII-19 Reverse Polarity

The "Processing|Advanced|Reverse polarity" option allows to reverse the polarity of the resistivity values in case

of the current was logged in IBA instead of IAB (in case of I_Fullwave unit using).

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VIII- Export To export the data of a file, this one has to be first displayed in the master window. The Prosys II software allows to export your data in various formats: To do that, select the "File|Export and save" menu or the

button.

The following types of export are offered: - ElecImager (specific format for OYO interpretation software) - Spreadsheet (with the separator type to define) - Spreadsheet Sounding (with the separator type to define) - Winsev (1D interpretation software of GEOSOFT) - Resix / Resix IP (1D interpretation DOS software of INTERPEX) - Ix1d / Ix1d IP (1D interpretation Windows software of INTERPEX) - Geosoft - Surfer - Res2dinv / Res3dinv (2D and 3D interpretation software of M. H. Loke) - GPS track (for map viewer software) or GPS track visualization for Google Earth software Remarks: - If some data have been un-validated or filtered from the original file, they won’t be present in these exported data files. - Once a file has been exported and saved, it can be opened from the software thanks to the "View|File" menu.

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VIII-1 Spreadsheet The data can be exported as a spreadsheet presentation to be compatible with standard software as Excel for further analysis and presentation ; the file will have the "txt" extension. This option is reached by the "File|Export and save|Spreadsheet" menu. Before selecting this option, you can define the separator type you wish to use by the "File|Export and save| Spreadsheet separator" menu. Then, you’ll be able to read this ".txt" file from the software thanks to the "View|File" menu: the "Report" window will appear then. The structure of such a file is the following one: For a data file directly downloaded to Prosys II: #, El array, Spa1/4, Rho, Dev, M, Sp, Vp, In, Time, Spa5/12, M1/20 - #: Data point number (corresponding to the memory zone of the resistivity-meter) - El array: Electrode array - Spa. 1/4: four spacing parameters (corresponding to the electrode array – in m) - Rho: resistivity value (in Ohm.m) - Dev: standard deviation (quality factor, in %) - M: global chargeability value (induced polarization parameter (in mV/V – "=0" if only-resistivity data)) - Sp: spontaneous polarization (measured just before the injection, in mV) - Vp: measured primary voltage (in mV) - In: injected current intensity (in mA) - Time: injection time (pulse duration, in s) - Spa. 5/12: other spacing parameters (in m) - M1/M20: partial chargeability values (induced polarization window (in mV/V – "=0" if only-resistivity data)) … For a data file imported from Electre version 1: El array, Vp, In, Rho, Spa1/4, Sp, Time, Dev, M - El array: array type number (Dipole-Dipole=0 - Pole-Dipole=1 - Pole-Pole=2 - Gradient=3 - Schlumberger sounding=4 - Schlumberger profiling=5 - Wenner sounding=6 - Wenner profiling=7 - Hole surface=8 - Other=9) - Vp: measured primary voltage (in mV) - In: injected current intensity (in mA) - Rho: resistivity value (in Ohm.m) - Spa. 1/4: four spacing parameters (corresponding to the electrode array – in m) - Sp: spontaneous polarization (measured just before the injection, in mV) - Time: injection time (pulse duration, in s) - Dev: standard deviation (quality factor, in %) - M: global chargeability value (induced polarization parameter (in mV/V – "=0" if only-resistivity data)) … Here is an example of such a file (exported with a "space" as separator):

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Then, in that case, while the opening of this exported file in Excel (for example), you’ll define the "space" as being the separator ; the data will be then displayed by columns.

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VIII-2 Spreadsheet sounding By this option, one can extract a sounding from a profiling data set measured according to a Schlumberger type array. The following window will appear:

- Enter the X location (mid-point of the quadripoles (in meters)), which will be the location of the sounding. - Enter the X span window (in meters) : allows to obtain an average value of the resistivity (accounting the points around the X location) - You can valid the "Keep non symmetrical quadripoles" box if you want to export also the points obtained with non symmetrical quadripoles (case of the "Schlumberger Reciprocal" array (offered in Electre III and Electre Pro)). Then, click on "Ok": enter the name of the exported file in the "Save as" window ; the file will have the "txt" extension with the following header: "Sounding location 75.00 / Span 10.00 AB/2 MN/2 Av.Rho" This file can be then opened from a 1D interpretation software.

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VIII-3 Winsev interface The Prosys II software allows to create automatically a data file with the Winsev format. After having selecting the "File|Export and save|Winsev" menu, you’ll have to introduce a file name in which the data will be exported. The file will have the "ws3" extension. In these options, you have the possibility to export the data acquired according to a "Schlumberger" or a "Wenner" sounding arrays. Please refer to the Winsev user’s manuals for details.

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VIII-4 Resix / Resix IP The Prosys II software allows to create automatically a data file with the Resix format. After having selecting the "File|Export and save|Resix/Resix IP" menu, you’ll have to introduce a file name in which the data will be exported. The file will have the "rex" extension for the "Resix" option, and the "rdp" extension for the "Resix IP" option. In these options, one can export the data acquired according to a "Schlumberger" or a "Wenner" sounding array. The structure of a "Resix" file is the following one: - Array type (Schlumberger=SCHL – Wenner=WENN) - Four informative lines (header) - # of the measuring point, Spacing (=AB/2 for Schlumberger – AB/3 for Wenner), Resistivity, Chargeability (if measured) Please refer to the Resix/Resix IP user’s manuals for details.

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VIII-5 Ix1d / Ix1d IP

The Prosys II software allows to create automatically a data file with the Ix1d format. After selection of the "File|Export and save|Ix1D / Ix1D IP" menu, you’ll have to introduce a file name in which the data will be exported. The file will have the "dat" extension. In these options, you have the possibility to export the data acquired according to a "Schlumberger" or a "Wenner" sounding arrays. The structure of a "Ix1D" file is the following one: - One informative line (header) - # of the measuring point, first spacing (=AB/2 for Schlumberger – AB/3 for Wenner), second spacing (MN) Resistivity, Chargeability (if measured) Please refer to the Ix1d user’s manuals for details.

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VIII-6 Geosoft The Prosys II software allows to create automatically a data file with the Geosoft format. After selection of the "File|Export and save|Geosoft" menu, select the electrode array of the data you wish to export ; in that option, you’ll have the possibility to export resistivity with chargeability (IP) data according to a "Dipole-Dipole", "Pole-dipole" or a "Pole-Pole" array.

Note that if the data have been measured according to a sequence created manually, the type of electrode array will be: "Mixed/Non conventional". So, to be able to export the data to Geosoft format, you’ll have to change first the electrode array to the correct type ("Dipole-dipole", "Pole-dipole" or "Pole-Pole"), by the "Processing|Change EL. Array" menu. The exported file will have the "dat" extension. The structure of a "Geosoft" file is the following one: - Two informative lines (header) - Position of the A, B, M, N electrodes, Vmn, Iab, Sp, Chargeability windows (up to 20) Please refer to the Geosoft software user’s manuals for details.

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VIII-7 Surfer The Prosys II software allows to create automatically a data file with the Surfer format. After selection of the "File|Export and save|Surfer" menu, you’ll have to introduce a file name in which the data will be exported. The file will have the "dat" extension.

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VIII-8 Export to 2D and 3D interpretation The Prosys II software allows to export for interpretation some data obtained along profiles (in X) or above a surface (X, Y coordinates). According to the ".bin" data file open, one has so the possibility to create a data file with the structure required by the Res2dinv or by the Res3dinv program.

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VIII-8-1 Res2dinv The Prosys II software allows to create automatically a data file with the Res2dinv format. After having selecting the "File|Export and save|Res2dinv/Res3dinv" menu, you’ll reach the following window:

This one allows to choose the following parameters: - Title appearing at the first line of the ".dat" file (by default: name of the ".bin" data file) - Electrode array (if several types of array are present in the ".bin" file, they will be offered in the list): select the one corresponding to the data you wish to export. - If the data file has some IP values, you’ll have the possibility to include them for the export, validating the box. - You’ll have moreover the possibility to choose the X-location distance (useful if topography) - Export the data in "Resistance" or "Resistivity" format. - And, at last, you can include automatically in the exported "dat" file, the GPS information contained in the "bin" file. Note: The "Mixed/non conventional" (general) array allows the user to export data for a Res2dinv interpretation when the acquisition has been performed with standard or non-standard electrodes locations. The data measured by the Syscal Kid / Kid Switch are managed, by default, as being data acquired according to a conventional array. Then click on the "Res2dinv" button. If you are exporting data acquired according to a "Pole-Dipole" or a "Pole-Pole" array, the Remote electrode location window will appear then: The "Save as" window appears then: introduce the name of the ".dat" file. The file can now be visualized by Prosys II by the "View|File" menu ; the Res2dinv program can also be run by the software (by the "Tools|Run Res2dinv" menu). Note: The first time you’ll use the "Tools|Run Res2dinv" option, you’ll have to specify the destination path of the "Res2dinv.exe" file ; and then, in the future, the selection of this command will run automatically the program. Here is an example of such a file:

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The structure of a "Res2dinv" file is the following one: For a conventional array: - File name (title specified before) - Smallest electrode spacing (smallest measurement step for the Equatorial array) - Array type (Wenner=1- Pole-Pole=2 - Dipole-Dipole=3 - Pole-Dipole=6 - Schlumberger=7 - Equatorial=8) - Spacing between the A-B pair (only for the Equatorial array) - Total number of data points - Type of X-location for datum points ("0", if location of first electrode in array used to measure the datum point is given - "1", if mid-point of array (i.e. location of datum points in pseudo-section) is given) - Flag for IP data ("0" for resistivity data only, "1" for resistivity & IP data) - X-location, Electrode spacing (A-M length for the Equatorial array), Depth index (for the Dipole-Dipole, Pole-Dipole and Schlumberger arrays), Resistivity, Chargeability (if measured): for each quadripole - Four "0" at the end of the file For a general (Mixed/non-conventional) array: - File name (title specified before) - Smallest electrode spacing - Array type for the general (mixed/non-conventional) array: 11 - Sub array type ("0" if several array types are present or "array type number" if only 1 array type is present) - Type of measurement ("0" if apparent resistivity or "1" if resistance) - Total number of data points - Type of X-location for datum points ("1" if true horizontal or "2" if distance along the surface, is given) - Flag for IP data ("0" for resistivity data only, "1" for resistivity & IP data) - Number of electrodes used, XC1, ZC1, XC2, ZC2, XP1, ZP1, XP2, ZP2, Apparent resistivity or Resistance, Chargeability (if measured): for each quadripole - Four "0" at the end of the file

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Notes: - After having added some data files with different electrode arrays, you’ll have the possibility to export the full data set to Res2dinv, choosing in the following window: "All array (RES2D only)". This corresponds to a mixed array with non specific electrode arrangement.

Please refer to the Res2dinv user’s manual for details. - In case of marine acquisition, the electrode array will be, by default, "Water floating nodes" ; in that case, while the export to the Res2dinv software, the program will ask to enter the water resistivity (measured for example with a conductivity-meter) and also the distance between the sounder and the first current electrode (enter "0" if the " Processing|Adjust GPS position" option has been used previously in the data set):

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VIII-8-2 Res3dinv The Prosys II software allows to create automatically a data file with the Res3dinv format, if of course the electrodes coordinates are defined along the X and Y directions. After selection of the "File|Export and save|Res2dinv/Res3dinv" menu, you’ll reach the following window:

This one allows to choose the following parameters: - Title appearing at the first line of the ".dat" file (by default: name of the ".bin" data file) - Electrode array (if several types of array are present in the ".bin" file, they will be offered in the list): select the one corresponding to the data you wish to export. - If the data file has some IP values, you’ll have the possibility to include them for the export, validating the box. - You’ll have moreover the possibility to choose the X-location distance (useful if topography) - Export the data in "Resistance" or "Resistivity" format. - And, at last, you can include automatically in the exported "dat" file, the GPS information contained in the "bin" file. Then click on the "Res3dinv" button. The "Save as" window appears then: introduce the name of the ".dat" file. The file can now be visualized by Prosys II by the "View|File" menu ; the Res3dinv program can also be run by the software (by the "Tools|Run Res3dinv" menu). Note: The first time you’ll use the "Tools|Run Res3dinv" command, you’ll have to specify the destination path of the "Res3dinv.exe" file ; and then, in the future, the selection of this command will run automatically the program.

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VIII-9 Export to GPS track mapping The Prosys II software allows to create automatically a data file with the "pcx5", the "gpx" or the "kml" extension , which are the format required by some Mapviewer software, such as Map source software. The file created by the "File|Export and save|Track (pcx5)" menu will have the "trk" extension. The file created by the "File|Export and save|Track (gpx)" menu will have the "gpx" extension. The file created by the "File|Export and save|Track (kml)" menu will have the "kml" extension (for Google Earth visualization) These files can be open directly by a map viewer software, so as to visualize on a map the position of the profile that has been performed. Example of a GPS track of a marine survey:

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VIII-10 View GPS track in Google Earth In case of the data set contains information in the latitude and longitude columns (like in case of a dynamic acquisition with a continuous storage of the GPS data), it's possible to visualize the track in Google earth software by the " View|View in Google earth" menu ; an automatic picturing will be done:

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VIII-11 View Waypoint in Google Earth The "View|View waypoint on Google earth" menu allows to display the fullwavers position in Google Earth:

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Remote electrode location While the export to Res2dinv software, it’s possible to specify the coordinates of the remote electrodes (C2, P2 for a "Pole-Pole" array, C2 for a "Pole-Dipole" array). To be able to introduce these coordinates, validate the "Exact geometric factor used" box of the "Remote electrode location" window.

For such a file (Mixed/non-conventional array with localization of remote electrodes), the structure of a "Res2dinv" file is the following one: - File name (title specified before) - Smallest electrode spacing - Array type for the general (mixed/non-conventional) array: 11 - Sub array type ("0" if several array types are present or "array type number" if only 1 array type is present) - Type of measurement ("0" if apparent resistivity or "1" if resistance) - Remote electrodes included C2 remote electrode X, Y and Z location X,Y,Z P2 remote electrode X, Y and Z location X,Y,Z Approximate geometric factor used - Total number of data points - Type of X-location for datum points ("1" if true horizontal or "2" if distance along the surface, is given) - Flag for IP data ("0" for resistivity data only, "1" for resistivity & IP data) - Number of electrodes used, XC1, ZC1, XC2, ZC2, XP1, ZP1, XP2, ZP2, Apparent resistivity or Resistance, Chargeability (if measured): for each quadripole - Four "0" lines at the end of the file Please refer to the Res2dinv user’s manual for details.

Prosys II

IRIS Instruments

IRIS INSTRUMENTS 1, avenue Buffon BP 6007 - 45060 Orleans Cedex 2, France Phone: +33.2.38.63.81.00 Fax: +33 2.38.63.81.82 E-mail: [email protected] Web site: www.iris-instruments.com

IRIS Instruments

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