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Information × Registration Number 0205U000606, 0102U000620 , R & D reports Title Interferometer Investigations of Cosmic Radio Sources at the Decameter Wavelengths. popup.stage_title Head Rashkovskiy Sergey Lvovich, Registration Date 03-02-2005 Organization Institute of Radio Astronomy of Sciences of Ukraine popup.description2 The results of experimental and theoretical studies of structure and spectra of a number extragalaxy radio sources with the decametre radio interferometers URAN are adduced. In an outcome of these measurements the most probable models of radio brightness distribution in the decametre range of radio waves at frequencies 20 and 25 МHz were determined for the first time for the radio galaxу ЗС234, the quasars ЗС216, ЗС380 and the pulsar PSR 1937. The connection of spectral dependences of space radio sources with their structure is investigated and when these dependences are shown the obviously expressed maxima of radiation on the certain frequency, the physical processes in the space which cause the such spectra are established and the parameters of a space medium are determined. The results of monitoring of the ionospheric scintillations are analyzed. The laws of amplitude distribution, changes in time of scintillation indexes, autocorrelation time, parameters of signal spectra, influence of scintillations at estimated power value, refraction angle are determined and frequency dependences of scintillation indexes are obtained on the basis of large amount of experimental data. Product Description popup.authors popup.nrat_date 2020-04-02 Close