I. A. Ryakhovskiy

Bio: I. A. Ryakhovskiy is an academic researcher. The author has contributed to research in topics: Ionosphere & Radio propagation. The author has an hindex of 1, co-authored 4 publications receiving 3 citations.

Sensor cluster for the atmospheric electric field and currents registration at the Geophysical Observatory "Mikhnevo"

Abstract: We study the surface electric field and the vertical atmosphere current at “Mikhnevo” geophysical observatory by means of a sensor cluster. The electric current sensor allows to disambiguate the displacement and conductive currents and to study their variations in sense of geophysical conditions. Data obtained under "fair weather" conditions and under significant perturbations are presented.

Recovery of the Parameters of the D-Layer of the Ionosphere According to the Amplitude-Phase Measurements on the Dual-Frequency VLF Path

Abstract: The paper presents a technique for recovery of the electron concentration profile, based on the two-parameter model of the D-layer of the ionosphere from measurements of the amplitude and phase variations of the VLF radio signal at two frequencies during a solar X-ray flash. Solar X-ray flash of the X8.2 class was processed in accordance with this technique. It was shown that the parameters of the ionosphere during the X-ray flash mainly depend on the radiation flux in the range of 0.05–0.4 nm. The dependence of the parameters of the ionosphere on the flow in the range of 0.1–0.8 nm is expressed to a much lesser extent.

Investigation of The Atmosphere and Ionosphere by The Radiophysical Measuring Complex of The “Mikhnevo” Geophysical Observatory

Abstract: A study of appearance and spatio-temporal dynamics of disturbances of the atmosphere, the upper and lower ionosphere, require of integrated investigations of interrelated processes at different altitudes and in different geophysical conditions. In the observatory of IDG RAS "Mikhnevo" created the unique radiophysical complex, allowing to carry out of coordinated measurements of variations of the geomagnetic field, propagation of SW, LW and VLF radio signals, variations of electric fields and atmospheric currents. Analysis of the data of measurements of the total electron content of the ionosphere with phase and amplitude of the signals of LF-VLF range on global and regional routes allows to obtain data on the features of the structure and dynamics of the ionospheric plasma in the mid-latitude zone of the European part of the Russian Federation. The coordinated analysis of GNSS and VLF signals makes it possible to study the mechanisms of the relationship between the perturbations of the upper and lower ionosphere and the dynamics of the ionosphere in the horizontal and vertical directions.

The influence of geometric factors and data processing algorithms on the error of GNSS position in the GFO "MIHNEVO"

Abstract: The results of the analysis of the navigation task solution in the conditions of registration of the signals of the global navigation satellite systems GPS and GLONASS in the Mikhnevo GFO (the geophysical observatory) are presented. It is shown that in the classical algorithm, the choice of satellites from the observed constellation should be made not according to the criterion of elevation, but by the number of conditionality of the navigation task matrix. The use of adaptive iterative algorithms almost completely compensates geophysical perturbations while maintaining the twofrequency regime.

Atmospheric Pressure and Electric Field Variations During Auroras

Abstract: The analysis of atmospheric pressure and electric field strength variations field observations in GPhO “Mikhnevo” was carried out. It is shown that during the development of auroras, synchronous variations in pressure and electric field strength in the surface layer of the atmosphere, as well as changes in the electric field characteristic for the development of a magnetic storm, can occur. The cross-correlation of these values was investigated, which showed a link between them.

Unipolar component of the electric field and vertical atmospheric currents according to the GFO "Mikhnevo"

Abstract: The paper presents the results of measurements of the electric field and vertical atmospheric currents in conditions of "fair weather" and their comparison with the Carnegie curve. The features of the measurement data associated with the detection of the evening maximum of the electric field strength are shown.

Near-surface electric field variations in Moscow City

Abstract: The study of the near-surface electric field strength variations was conducted on the basis of experimental data obtained at the Geophysical Monitoring Center of IDG RAS in Moscow and the Geophysical Observatory ‘Mikhnevo’. This paper features the results of analysis of electric field variations in Moscow and in GO ‘Mikhnevo’ registered for the period 2015 - 2019, and specifics of daily electric field strength variations depending on the season.