Improvements to LGPR Capability

A method and a surface penetrating radar (SPR) system for localization of a vehicle are disclosed. The method includes transmitting a radar signal having a first frequency into a subsurface region adjacent to a vehicle. A first set of SPR images of a first subsurface volume within the subsurface region is acquired and location data for the vehicle are determined from the first set of SPR images. A second radar signal having a frequency that is greater than the first frequency is transmitted into the subsurface region and a second set of SPR images of a second subsurface volume within the subsurface region is acquired. The second subsurface volume at least partially overlaps the first subsurface volume. Location data are determined from the second set of SPR images at a greater resolution than the location data determined from the first set of SPR images.