Evaluation of Materials and Structures with a Multistatic Ultra-Wideband Impulse Radar: A Concept Validation oleh Gatis Gaigals, Romans Maliks, Vladimir Aristov, Rolands Savelis, Janis Simanovics, Eduards Lobanovs, Haralds Egliens, Dans Laksis, Kristaps Maris Greitans, Modris Greitans