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. Now a day the task of comparative analysis of sample sources from different astronomical catalogs is becoming very topical for astronomers. It is useful both for the same spectral range data and for their cross-analysis for different spectral ranges. It is also important, that the real data from astronomical instruments is placed on-line. For the above purposes we are developing a website for the PRAO ASC LPI (www.prao.ru) and, based upon it, the Radio As­tronomy Data Center (RADC). The RADC is a system for storage and processing of radio astronomical data. Here you can find a collection of tools for preparing radio astronomical observations, which includes a base set of main astronomical catalogues useful to radio astronomers, as well as a database of observation results from the Observatory.