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At present the technology of identifying the objects by their radiation in radio band is developing rapidly. The use of submillimeter band allowed approaching the radio bright image to the photographic one. The use of decimeter and centimeter bands allowed identifying the objects under ground. In the article the theoretical foundation of identifying and recognizing objects on the ground, on water and under ground is presented. Estimated values of radio bright contrasts of various objects on the surface and under surface of the ground are presented. In the article the results of flight (aircraft and space) experiments of measuring radio bright image over ground, above water and under ground are given.