Abstract: A method for increasing localization utilizing overlapped broadband pulses includes using a transform to convert broadband returns into wavelength based returns. The wavelength based returns are grouped into at least two wavelength group returns for each location having different focal diameters. Intra-return probabilities of object location are computed from the group returns. Inter-return probabilities are computed for overlapping regions of the pulse returns. A pixel grid is established for displaying the calculated object location probabilities. By further processing, the pixel grid can be refined to show finer details.

Abstract: A method for detecting suspended discontinuity densities in a material is provided. The method includes transmitting terahertz electromagnetic radiation toward a surface of the material. This radiation is received at an expected location after interacting with the material. The power level of the received radiation is measured and deviation from the expected value is used to determine a suspended discontinuity density gradient in the material. The method can be used with either reflected radiation or transmitted radiation. Embodiments of the method can calculate the index of refraction in the material and correlate this with the suspended discontinuity density of the material.