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Information × Registration Number 0225U002118, (0122U000549) , R & D reports Title Creation of research equipment and improvement of radiophysical research methods of shells of the Earth and the near-Earth environments popup.stage_title Створення науково-дослідної апаратури та удосконалення методів радіофізичних досліджень оболонок Землі та навколоземного середовища Head Zakharenko Viacheslav V., д.ф.-м.н. Registration Date 19-02-2025 Organization Radio Astronomical Institute of the National Academy of Sciences of Ukraine popup.description1 Improvement of the scheme of technical solution and adjusting the accompanying design documentation of the analog processing of the signals of the laboratory prototype of a compact device for investigating the streams of high-energy charged particles of space origin; development and manufacturing of a laboratory analogue high-sensitive three-channel electronic module for testing spectrometric parameters of small-sized scintillation and semiconductor detectors of elementary charged particles of high energies. Modernization of spectrometers of IRA of the NAS of Ukraine in order to improve their characteristics, introduction of modern semiconductor sources of microwave radiation, as well as increasing the productivity of research by ensuring the simultaneous independent operation of microwave and atomic beam spectrometers. Development of a mathematical model of a microstrip antenna with aт axisymmetric excitation, a dielectric layer of which is shielded by an impedance surface. Development of proposals for improving methods and algorithms for detecting slow radar targets with low RCS based on improvement of microwave radar resolution at angular and frequency (velocity) coordinates. Creation of new and improving existing devices, methods and means of processing radio signals in a wide range of frequencies for the diagnosis of near-Earth space. popup.description2 A semi-automatic algorithm for identifying interplanetary shock waves has been developed using statistical analysis of solar wind and interplanetary magnetic field parameters. To increase the sensitivity of measurements, a reference synthesizer based on a 100 MHz quartz oscillator with ultra-low phase noise synchronized to the rubidium standard has been developed for the modernization of an automated spectrometer in the millimeter wavelength range and a laser-microwave atomic-beam spectrometer for studying Rydberg states of atoms. Numerical modeling of the electrodynamic characteristics of a complex-composition microstrip antenna in the centimeter wavelength range has been performed. High efficiency of electromagnetic wave radiation with different types of polarization has been demonstrated. Methods and algorithms for detecting slow-moving targets against the background of reflections from local objects and the underlying surface have been improved. The proposed differential algorithm provides a gain in the signal/clutter ratio of more than 10 dB compared to classical algorithms based on terrain maps. A method for real-time reproduction of ionosphere characteristics from ionograms at the Ukrainian Antarctic Station “Academician Vernadsky” using artificial intelligence technologies has been developed. The obtained data are used in calculating current global maps of ionosphere critical frequency depressions used at the European Space Weather Center PECASUS. Round-the-clock continuous registration of HF radio signals of precise time service stations has been launched at three measuring points: at the LOFAR PL610 observatory (Borovets, Poland), in Tromso and on the island of Svalbard (Norway) according to the schedule used at the UAS “Academician Vernadsky”. Product Description popup.authors Aliekseiev Yevhenii A. Budnikov Vladyslav V. Bulakh Yevhenii V. Vlasenko Оleksandr M. Halushko Volodymyr H. Dudnyk Oleksii V. Zakharenko Viacheslav V. Kashcheiev Serhii B. Kochin Valerii M. Lysachenko Volodymyr M. Reznychenko Artem I. Tilnyi Pavlo P. Yakovlev Oleksandr V. popup.nrat_date 2025-02-19 Close