The primary NASA application of the proposed SIRIUS system is a compact NDE system that can be used for evaluating structural integrity of spacecraft components during spaceflight, with the capability to provide reliable, high-resolution assessments of the locations and extent of damage within thermal protection, micro-meteoroid and orbital debris (MMOD) shields, inflatable habitats, EVA suits and vehicles, electronic systems, conductive structures, pressure vessels, and other lightweight materials, with the ability to function in hard-to-access areas within both pressurized habitable compartments and external space environments. Additional NASA applications include in situ NDE of large-area non-uniform multilayer aluminum/titanium/composite structures with complicated geometry used in the development of advanced aircraft and spacecraft, providing accurate identification, localization, and measurements of all types of internal and surface defects. Military applications of the SIRIUS system will include in situ NDE of U.S. Navy, Army, and Air Force military aircraft with large-area non-uniform multilayer aluminum/titanium/composite structures that have complicated geometry (and also combined textile polymeric, ceramic, and metal matrix composite structures). The SIRIUS system will also be used for the NDE of airplane, helicopter, and missile parts containing electronics, mechanics, propellants, explosives, etc., to detect their defects and integrities. The SIRIUS system can be incorporated by the U.S. Navy, Army, and Air Force as a reliable, rapid, robotic, easy-to-use NDE system. Potential DHS applications include the detection of vehicle-borne contraband, drugs, and explosives. The commercial availability of the SIRIUS system includes its use for in situ NDE of large-area non-uniform components in aging and modern commercial aircraft, spacecraft, light marine vessels, and any application requiring defect detection for multilayer ceramic, composite, metallic, and plastic non-uniform structures.