Radiospectrum of the Galaxy in the range of 200-350 MHz

Results of absolute measurements of spectral characteristics of distributed cosmic radiowave radiation in the range of 200-350 MHz in 1982-85 are present. Specific feature of these observations was enough high angular resolution (6.7 deg) similar at all working frequencies which resulted from the application of a ''black'' disk method. Disk disposition relative to antenna provided passing of celestial areas on circle of deffection δ=-6.5 deg through a main ray of directivity diagram at the expense of Earth diurnal rotation. All observations have been performed at a radioastronomic complex consisting of 12 m RTVS-12 radiotelescope and 5 m black disk placed in the Fresnel antenna area. Results of radiocontrast measurements in the direct ascenation range α=16.00-00.00 are presented. Brightness temperature profiles calculated from measurements at 212, 245, 290 and 350 MHz have been constructed. Angular variations of differential spectrum of nonthermal cosmic radiowave radiation were observed at a trajectory δ=-6.5 deg and α=18.30-00.00. As there are no powerful discrete sources in the given area, noted spatial variations has objective nature and agree qualitatively with results of other works