Patent ID: 9157993
Filing Date: 2015-10-13
Classification: G01S,G01V

Abstract:
1. A method of detecting an underground object, the method comprising: determining a first view of the object, which is at least partially under a surface of ground, by transmitting a first radar signal from a first known geolocation, wherein a medium between the surface of the ground and the object comprises multiple layers of different types of material; determining a second view of the object by transmitting a second radar signal from a second known geolocation, wherein respective first and second trajectories of the first and second radar signals are oblique with respect to the surface of the ground and the respective first and second trajectories are at a first angle with respect to each other; determining a velocity that at least one of the radar signals traveled through each of the layers; determining estimated dielectric constants for each of the layers based on the respective velocities for each of the layers; and estimating a position of the object by maximizing a correlation between the first view and the second view by adjusting an estimated dielectric constant associated with medium between the object and the surface of the ground, wherein the determining of the first view, the determining of the second view and the estimating are performed by one or more computer processors.