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Information × Registration Number 0225U002128, (0122U000555) , R & D reports Title Development and implementation of highly efficient elements and systems of radio telescopes, applied aspects of radio astronomy popup.stage_title Розробка і впровадження високоефективних елементів та систем радіотелескопів, прикладні аспекти радіоастрономії Head Kalinichenko Mykola M., Доктор фізико-математичних наук Registration Date 19-02-2025 Organization Radio Astronomical Institute of the National Academy of Sciences of Ukraine popup.description1 Development and implementation of effective elements and systems for radio astronomical observations, as well as the study of factors that affect the excellence of radio astronomical observations, in order to develop methods that will allow greater sensitivity and accuracy to find the energy, space, spectral and polarization characteristics of cosmic radio radiation on existing radio telescopes and those under construction. First of all, the work will be aimed at improving the characteristics and capabilities of Ukrainian radio telescopes (UTR-2, URAN-1-4, GURT and RT-32). But a significant number of the results that are planned to be obtained can be used on other radio astronomical instruments (NenuFar, LOFAR, SKA and others). popup.description2  1. The possibility of creating an electromagnetic model of the UTR-2 radio telescope section based on numerical modeling has been analyzed. Mathematical relationships have been obtained that allow calculating all antenna parameters of the section. 2. It has been shown that the effective noise temperature of the calibration NG of the UTR-2 radio telescope, determined using a spectrum analyzer, differs by less than 10% from the results obtained earlier in the 70s and 80s. The effective noise temperature has hardly decreased in more than fifty years, as predicted. 3. A new method for increasing the stability of RF amplifiers has been developed and applied in practical designs of RF amplifiers made on both microcircuits and discrete elements. 4. A design of a dipole with a mesh ground screen has been proposed, which can serve as an element of an active phased antenna array for the Antarctic low-frequency radio telescope. 5. A structural scheme of a prototype radio telescope in Antarctica has been proposed, and the choice of geometry for the phased antenna array of the radio telescope has been justified. 6. Two GURT subarrays have been restored at the S.Y. Braude Observatory (Hrakove). 7. The ratio of the flux of the young supernova remnant Cassiopeia A to the flux of the radio galaxy Cygnus A in the 20-70 MHz range for the epoch 2024 has been experimentally determined. 8. Observations of the radio emission of the Sun using restored elements of the GURT radio telescope have been conducted. An irregular database of 2024 low-frequency sporadic radio emissions of the Sun have been created. 9. Studies of the GURT radio telescope control system hardware and software complex have been conducted to eliminate existing instabilities in their operation. Product Description popup.authors Yerin Serhii M. Andrieiev Ihor V. Bielov Oleksandr S. Bortsov Victor V. Bubnov Ihor M. Vasylkivskyi Yevhen V. Holovko Tetiana V. Dorovskyi Volodymyr V. Zakharenko Viacheslav V. Kalinichenko Mykola M. Konovalenko Oleksandr O. Melnyk Valentyn M. Reznichenko Oleksandr M. Selin Vladyslav Yu. Sydorchuk Mykhailo A. Stanyslavskyi Lev O. Stanyslavskyi Oleksandr O. Tymoshevskyi Anatolii H. Tokarskyi Petro L. Ulianov Oleh M. Khrystenko Oleksandr D. Shevchenko Valerii V. Shevchuk Mykola V. Shepeliev Valerii O. popup.nrat_date 2025-02-19 Close