... RATAN-600 data for the BL Lacertae objects (multi-frequency catalogue, Version 1.0) . GPS radio sources . ... BL Lacertae objects . RATAN-600 radio telescope was used to study the spectral characteristics of a uniform sample of 504 radio sources from the NVSS (NRAO VLA Sky Survey) catalog near the North Celestial Pole at six frequencies, with the aim of selecting sources possessing inverted spectra near 22 GHz, to be included in the program of the RadioAstron future space VLBI mission. ...