Electrical Resistivity: Equipment
Instrumentation
The Discovery Programme has a Geoscan Research RM15-D Resistance Meter with the PA20 Multi-probe Array, and MPX15 multiplexer.
The Geoscan Research RM15-D webpage gives the detailed specification of the system, and how the array and multiplexer can be utilised to extend the operational functions of the system.
Data Processing Software
Data is downloaded from the data logger and processed in GEOPLOT 3.0 software from Geoscan Research.
Processing functions include : high pass, low pass, median, Wallis & periodic filters, spectrum and variance analysis, despiking, interpolation, edge matching, zero mean traverse correction, destagger correction, several numeric functions and a powerful cut and combine function for combing data sets mathematically. A record of every edit and process is maintained with each data file. Graphics may be produced as shade plots (grey scale or colour), trace plots (stacked profiles or 3D), dot-density or pattern plots and may be printed out at any scale or saved as bitmaps for use in other software packages