Vashchishin R. Definition of angular structure of a radiation of space radio sources in decameter lengths of waves

The Object is a radio emission of space radio sources; the purpose is definition of angular structure of a radio emission of space radio sources; the methods are VLBI, statistical, modelling; the new approach are: for the first time the models of radio brightness distribution of source 4С21.53 with pulsar PSR 1937+214, a quasar 3С216, radio galaxies 3С338, 3С295 and 3С234 at frequencies of 25 and 20 MHz are received. It is shown, that these radio sources have complex structure of radio brightness distribution at ultrahigh frequencies which at decameter waves undergoes significant changes. Studying of spectra of these radio sources has enabled to establish the reasons which result in these changes. For the first time the array of a radio telescope URAN-2 is described, principles of build-up, phasing and control of a directional beam in details are irradiated, measurements and calculations of its basic technical characteristics in a wide frequency band - from 9 up to 32 MHz are presented.