VLFPROS - A Matlab code for processing of VLF-EM data

The very low frequency electromagnetic (VLFEM) technique is well established for rapid geological mapping and detection of buried conductive targets. The technique makes use of signal radiation from military navigation radio transmitters. There are about 42 global ground military communication transmitters operating in VLF frequency in the range of 15–30 kHz. These stations, located around the world, generate signals which are effectively used for a variety of applications including navigation and communication, ground water detection or contamination, soil engineering, cultural detection, ionospheric, meteorological, archeological, nuclear waste detection and VLF band transmission studies, besides mineral exploration, mapping of fault zones, etc. (Wright, 1988; Philips and Richards, 1975; Sundararajan et al., 2006). The detection of subsurface conductors is made feasible by means of a portable VLF receiver, which, in most commercial instruments, provides a