Survey of instantaneous 1-22 GHz spectra of 550 compact extragalactic objects with declinations from-30 degrees to+43 degrees

We present observational results for extragalactic radio sources with milli arcsecond components, obtained with the 600 meter ring radio telescope RATA N-600 from 1st to 22nd December, 1997. For each source, a six frequency bro ad band radio spectrum was obtained by observing simultaneously with an acc uracy up to a minute at 1.4, 2.7, 3.9, 7.7, 13 and 31 cm. The observed list is selected from Preston et al. (1985) VLBI survey and contains all the so urces in the declinations between -30 degrees and +43 degrees with a correl ated flux density exceeding 0.1 Jy at 13 cm. The sample includes the majori ty of sources to be studied in the current VSOP survey and the future Radio Astron Space VLBI mission.