| 摘要 |
Disclosed is a method of determining subsurface composition of a surveyed region. The method comprises transmitting a pulsed electromagnetic signal into the ground and detecting a return signal following interaction of said transmitted signal with features of the subsurface, a profile image of the subsurface is then obtained, and one or more spectra of said return signal is calculated, said one or more spectra comprising one or more of an energy-frequency spectrum, a phase-frequency spectrum, a phase-energy and an energy-frequency spectrum. These spectra are analysed to determine a characteristic energy-frequency signature, phase-frequency signature, phase-energy signature and/or energy-frequency signature for one or more layers of said subsurface. The determined signature(s) are then compared to a database of equivalent signatures of known materials in order to determine a composition of said one or more layers. |
