Download DAT31W - Geonics Limited

1. Introduction
This Windows based program replaces the DOS version of software DAT31. Survey data reduction program for
Geonics EM31 ground conductivity maters operates under Windows 95/98/XP/NT(4.0), and Windows 2000.
While both versions, DOS and Windows, perform basically same functions, the Windows version of DAT31 provides a much easier users interface, better information on the screen, larger amount of readings can be operated on
in one block, limited only by capacity of a computer hard drive, support for any printer and plotter supported by
Windows, and has more control and faster completion of most of the tasks. In addition DAT31W supports EM31
data files which include Global Positioning System (GPS) data recorded directly in logger Allegro (Pro4000) operating under the control of program EM31alg.
1.1 About DAT31W
The program DAT31W is designed to process data collected by Polycorders 600 and 720 operating under
corresponding programs EM31-MK2 and EM31, data recorded in the field computer Allegro (or Pro4000)
using data acquisition program EM31alg, or data acquired directly in the computer through the RS232
interface. It allows transfer of data files from the Polycorder or Allegro to a Personal Computer (PC).
Subsequently, it can be used to display, edit, print and plot data files. Data can be plotted on the computer
screen and on any printer supported by Windows. There is an option to create files that can be used as
input for the GEOSOFT or SURFER contouring packages, or any other contour software, if three column
[X,Y,data1] format is suitable.
This Windows based version of DAT31W provides a much easier interface and better information on the
screen. The amount of readings is limited only by the capacity of a computer hard drive. It supports any
printer and plotter that is supported by Windows and gives more control and faster completion of tasks.
The latter can be especially appreciated by users employing Auto mode and fiducial markers during survey.
Positioning of markers and aligning of survey line ends, even in the case of large survey layouts, is much
faster and easier as compared to the DOS based program.
Additional improvements were also introduced to the data downloading. The program lists the Polycorder
or Pro4000 data files and their sizes, and the user may simply select files to be downloaded without having
to review the Polycorder directory. Still, DOS based downloading programs are included on the disk in
order to support older DOS or 16 bit Windows (3.1 or 3.11) based computers.
Overall processing of the EM31 data with this Windows based software will result in much greater productivity. File formats are compatible with older DOS based versions of DAT31 and DAT31-MK2 programs.
However to download data from the Polycorder 600 or 720 a new version of the Polycorder program
EM31-MK2 (for Polycorder 600) or EM31 (for Polycorder 720) has to be installed in the logger. These new
Polycorder programs are still compatible with the DOS based software so data files can be downloaded
using a new DAT31W for Windows as well as older DOS based DAT31 software.
EM31 readings are arranged in profile lines. Every profile line can consist of unlimited number of segments. Each profile line can contain up to eight separate curves: two for the Inphase and Quadrature
1. Introduction
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