LAUSR

We present the results of solar observations at 20 and 25 MHz with the Ukrainian T-shaped Radio telescope of the second modification (UTR-2) in the interferometric session from 27 May to 2 June 2014. In this case, the different baselines 225, 450, and 675 m between the sections of the east–west and north–south arms of UTR-2 were used. On 29 May 2014, strong sporadic radio emission consisting of Type III, Type II, and Type IV bursts was observed. On other days, there was no solar radio activity in the decameter range. We discuss the observation results of the quiet Sun. Fluxes and sizes of the Sun in east–west and north–south directions were measured. The average fluxes were 1050 – 1100 Jy and 1480 – 1570 Jy at 20 and 25 MHz, respectively. The angular sizes of the quiet Sun in equatorial and polar directions were 55′$55'$ and 49′$49'$ at 20 MHz and 50′$50'$ and 42′$42'$ at 25 MHz. The brightness temperatures of the radio emission were Tb=5.1×105K${T_{\mathrm{b}}} = 5.1 \times{10^{5}}~\mbox{K}$ and Tb=5.7×105K${T_{\mathrm{b}}} = 5.7 \times{10^{5}}~\mbox{K}$ at 20 and 25 MHz, respectively.