Broadband synthetic aperture borehole radar interferometry

Three‐dimensional borehole radar imaging using synthetic aperture time‐domain focusing

“…We will get a high value of G(x,y,z) in a grid position (x,y,z) if there is a point scatterer present at (x,y,z). Multiplication of two signals will give non-zero value where the two signals overlap (Mason et al 2001). In a real situation we will never get zero value of G, the presence of a target is indicated when some threshold is exceeded.…”

“…Three-dimensional orebody geometry estimates derived from coring never have sufficient detail, due to lateral inhomogeneity. Trials in mines have established that wideband VHF borehole radars, working in the 10-100 MHz band, can be used to probe the rockmass between boreholes over ranges from <5m to as much as 150m with submetre resolution (Mason et al, 2001).…”

Synthetic Aperture Imaging in Advanced Detection of Roadway Using Mine Transient Electromagnetic Method

“…Ganguli et al (2012) studied the synthetic aperture focusing imaging technology of ultrasonic inspection for concrete. In electromagnetic exploration, Mason et al (2001) studied the use of broadband borehole radar synthetic aperture interference method to plot 3D ore body map, Zhang and Zhou (2004) studied ground penetrating radar SAI based on stolt migration. In whole space transient electromagnetic numerical simulation, Li and Huang (2014) applied the complex frequency perfectly matched layer absorbing boundary condition to the uniform whole space model and the whole space model containing the roadway and the anomalous body.…”