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We present observational results for extragalactic radio sources withmilliarcsecond components, obtained with the 600 meter ring radio telescopeRATAN-600 from 1st to 22nd December, 1997. For each source, a six frequencybroad band radio spectrum was obtained by observing simultaneously with anaccuracy up to a minute at 1.4, 2.7, 3.9, 7.7, 13 and 31 cm. The observed listis selected from Preston et al. (1985) VLBI survey and contains all the sourcesin the declinations between -30deg and +43deg with a correlated flux densityexceeding 0.1 Jy at 13 cm. The sample includes the majority of sources to bestudied in the current VSOP survey and the future RadioAstron Space VLBImission.Comment: 26 pages, 4 figures, 5 tables, published in the A&AS; figure 4 with  the broad-band spectra plots is included in the preprint; tables 1 and 5, in  electronic form, as well as the ReadMe file can be extracted from the  preprint sourc

Survey of instantaneous 1-22 GHz spectra of 550 compact extragalactic objects with declinations from $-30^\circ$ to $+43^\circ$