Geomar Software Inc.

- Version 31 - Field Data Acquisition Software

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The TrackMaker system will allow you to perform surveys faster by covering sites with uniformly spaced lines while avoiding skipping areas, and preventing the potential overlap of survey lines. And with these features also comes the simultaneous full control of the electromagnetic instrument output, data quality and current settings.

In the event of any field obstruction you can resume your survey line at a precise location, without using conventional methods of positioning (tapes, stakes, etc.). You can complete your survey even with low visibility or darkness and still maintain full control over the area of coverage and the quality of electromagnetic instrument readings.

Assuming the initial easy setup of the program is performed at least once, you can then locate yourself in the field and monitor the instrument data within a few minutes of starting the survey. The program displays a map (at a user specified scale) which shows your current position and all the recorded positions in real time. The employed GPS receiver will be the determining factor for the accuracy of your positioning.

Each TrackMaker program has been optimized for each instrument to take full advantage of its capabilities and varying data output.
Please click on corresponding name of the conductivity meter or metal detector to view detailed description of TrackMaker features for a specific instrument.

NAV31 Features (data acquisition program)

Display functions:

  • Displays locations of logged GPS positions and current location of an operator in real time while in Navigation mode
  • Scale of map is user specified (meters or feet) and it scrolls automatically once the end of the screen is reached
  • EM31 conductivity and Inphase data is displayed with moving graphic bars and in numeric form, EM31 dipole mode and instrument range also monitored
  • Current GPS antenna position in Latitude/Longitude, type of differential corrections (AGPS, DGPS, RTK, Phase), PDOP or other equivalent parameter (depends on NMEA used), number of satellites, and number of GPS positions in the file
  • Positions of interpreted anomalies which are entered as an ASCII file allow you to navigate to points of interest

Survey parameters:

  • Survey modes supported (Auto, Wheel, or Manual)
  • Integration of readings available in Manual mode (up to 100 readings per station)
  • Maximum rate of data acquisition is 10 Hz (assuming 1 Hz GPS output)
  • New Line, New Station, Comment entry
  • Change of scale in Navigation and Profile modes at any time

GPS functions:

  • Configuration of logger serial port to
  • accommodate any GPS settings
  • GPS output monitoring
  • Support for NMEA messages: GGA, GGA/GSA, GLL, POS, LLQ, LLK, GGK, and stream from Leica Robotics Total Station TPS1100
  • Option to act as a stand-alone GPS logger, which would allow data to be collected in GXY file format (compatible with any TrackMaker or Multi program)
  • Offset for GPS antenna in any direction

Position EM31 readings and create XYZ file based on standalone TrackMaker31 file:

  • Apply GPS antenna offset in any direction (as entered in the field with option of correcting this parameter during data processing)
  • Include elevation data with correction for antenna height
  • Filters the quality of positioned data based on GPS parameters as PDOP (or equivalent) and the degree of differential corrections
  • Field QC parameters (Quality Indicator, number of Satellites and PDOP) are written into the generated XYZ file
  • Further enhancement of the collected EM31 readings position is obtained by specifying the GPS Time Gap and GPS Minimum Interval
  • Choice of coordinates in generated XYZ file: Geodetic coordinates (Latitude/Longitude in degrees) or in UTM coordinates (WGS 1984 datum in meters, feet, or US Survey feet)

Position EM31 readings and create XYZ file based on external GPS file:
 (This function is used when real time GPS differential corrections are not available, or when further post processing of GPS data may improve positioning accuracy)

  • Apply GPS antenna offset in any direction (as entered in the field with option of correcting this parameter during data processing)
  • Further enhancement of the collected EM31 readings position is obtained by specifying the GPS Time Gap and GPS Minimum Interval

Miscellaneous:

  •  Convert TrackMaker31 files to Geonics DAT31 format
  • Convert TrackMaker31 files to general format ASCII file
  • Convert GXY file to ASCII file containing positions
  • Retrieve and position field comments from TrackMaker31 file
  • Apply System Time Constant delay in generated XYZ file
  • Transfer data file from field computer to PC
  • View TrackMaker31 file contents

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