1. A system for detecting, visualizing, and reporting the near-surface condition of a multi-layer system to provide lifecycle predictive and damage alert capabilities, said system comprising: a) normal incidence detection means for detecting the surface response of the structure and one or more of its structural components at a far-field distance with signal collection devices configured in normal incidence scheme for ISAR measurements; b) oblique incidence detection means for detecting the surface response of the structure and one or more of its structural components at a far-field distance with signal collection devices configured in oblique incidence scheme for ISAR measurements; c) data collection means for data collection including one or more digital computers having a control program for acquiring and storing data from the detecting means and, and for optionally changing the operating characteristics of the normal incidence means and the oblique incidence means; d) processing means for processing structural responses collected by the normal incidence means and the oblique incidence means using tomographic reconstruction methods, said tomographic reconstruction methods further comprising a plurality of implementation algorithms for visualizing structural response for condition assessment; e) communicating means for communicating with the data collection means and processing means; and f) a numerical program implementing tomographic reconstruction methods that processes, visualizes, and displays imagery representing structural condition.