Zakharenko V. Pulsed and sporadic radio emission of Galactic objects at decameter wavelengths

The research object: galactic source pulse, sporadic and transient radiation at decameter wavelengths. The purpose of the thesis: significant expansion of research decameter radio emission with a small characteristic duration by developing equipment, methods of observation and processing, as well as the discovery of new sources and parameters of their radio emission. Research methods: mathematical methods of signal processing and radio engineering methods to improve sensitivity and linearity of the receiver equipment. New theoretical and practical results: The present thesis is devoted to a new scientific direction - a search for new sources and types of transient decametric emission observable from the ground. During this work, the world's largest decameter radio telescopes UTR-2 have been modernized, including their amplification, commutation, receiving and recording systems as well as algorithms and programs for data processing. Maximizing interference immunity permitted to suppress most of the interference of natural and artificial origin. As a result for the first time the radio emission of 30 pulsars were detected in the decameter range. Their low-frequency characteristics with high accuracy were achieved. The sporadic radio emission generated by thunderstorms in Saturn's atmosphere has been detected. Ground-based data with high temporal and spectral resolutions allowed to obtain for the first time the temporal structure of SED down to a characteristic time of a few microseconds. For the first time the dispersion delay due to interplanetary propagation was revealed in the SED signals. Application field: astrophysics, radioastronomy, astronomy.