The book is devoted to solving theoretical and practical problems of detection, measurement of parameters and classification of spatially distributed targets (PRC) according to their radar images (RLE) formed in a multi-position observation system implemented by a group of spacecraft. The book details the methods of synthesis and analysis of the PRC classification algorithms, algorithms for estimating radar image parameters, classification algorithms using neural networks, partially coherent radars, algorithms for generating radar images of moving objects, speckle noise filtering methods, interference immunity analysis methods, methods of geocorrection of generated radar images.