Correlated Disturbances of the Upper and Lower Ionosphere from Synchronous Measurements of Parameters of GNSS Signals and VLF Radio Signals

Гаврилов, Б. Г.; Zetser, Yu. I.; Lyakhov, A. N.; Poklad, Yu. V.; Ryakhovskii, I. A.

doi:10.1134/s0010952519010039

Cited by 10 publications

(4 citation statements)

References 11 publications

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“…So, the combined analysis of variations of GNSS signals and signals from VLF radio stations is an effective method for studying the interrelated processes in the upper and lower ionosphere [23,24].…”

Section: Resultsmentioning

confidence: 99%

The Influence of the Lower Ionospheric Disturbances on the Operating Conditions of Navigation Satellite Systems

Гаврилов¹,

Poklad²,

Ryakhovskiy³

2020

Satellites Missions and Technologies for Geosciences

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The study of the impact of ionospheric disturbances on the conditions of functioning of satellite communication and navigation systems and the development of methods to reduce this effect requires the development of methods for evaluating the parameters of ionospheric disturbances and their spatial and temporal distribution. Studies show that electron concentration disturbances, which can have a significant impact on the functioning of transionospheric radio channels, can occur both in the upper and lower ionosphere. At the same time, the methods of studying the dynamics of ionospheric disturbances in the lower ionosphere are not enough developed, and the interrelation of the lower and upper perturbations of the ionosphere is insufficiently studied. The aim of the work is an experimental study of disturbances of the upper and lower ionosphere in order to clarify the mechanisms of their relationship and study the spatiotemporal distribution of mid-latitude disturbances. The results obtained show that the contribution of the electron density disturbances in the D region to the total electron content of the ionosphere can be significant and considerably depends on the type of heliogeophysical processes.

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Section: Resultsmentioning

confidence: 99%

The Influence of the Lower Ionospheric Disturbances on the Operating Conditions of Navigation Satellite Systems

Гаврилов¹,

Poklad²,

Ryakhovskiy³

2020

Satellites Missions and Technologies for Geosciences

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“…Midlatitude Mikhnevo geophysical observatory of the Sadovsky Institute of Geospheres Dynamics is located 80 km southward of Moscow (54°57′N, 36°47′E). The main research project at Mikhnevo is the study of the lower ionosphere using ELF‐LF electromagnetic waves measurements as well as the coupling between lower and upper ionosphere using global positioning system (GPS) and high frequency receivers (Gavrilov et al., 2019). Recently, new results for the lower ionosphere have been obtained using the promising coupling of VLF measurements with theoretical models (Bekker et al., 2021).…”

Section: Data and Equipmentmentioning

confidence: 99%

Long‐Term Schumann Resonance Dynamics Based on Horizontal Magnetic Field Data at Mikhnevo Observatory During 2016–2020

2022

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It is the first time when we present a significant amount of two-channel (north-south and westeast) absolute magnetic field data in the extremely low frequency (ELF) band for the European Russia. The measurements are evaluated at Mikhnevo geophysical observatory of the Sadovsky Institute of Geosphere Dynamics. We start with a recently proposed unified processing procedure by Rodriguez-Camacho et al. (2018, https://doi.org/10.1029/2018jd029462) and further elaborate an ELF spectrum calculation technique. The true sequence of the spectrum calculation is presented, including the proper parameters, software requirements, and the use of third-party libraries. We receive an optimal set of processing parameters for Mikhnevo observatory and discuss the long-term (2016-2020) Schumann Resonance variations.

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“…Since 2014, Mikhnevo has been continuously monitoring the amplitude and phase characteristics of electromagnetic signals from VLF transmitters located throughout the world (Gavrilov, Zetser, et al., 2019).…”

Section: Experimental Data Obtained At the Mikhnevo Geophysical Obser...mentioning

confidence: 99%

Modeling of the Lower Ionosphere During Solar X‐Ray Flares of Different Classes

2021

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This study presents the results obtained from modeling the lower ionosphere response to C‐, M‐ and X‐class solar X‐ray flares. This model is based on a 5‐component scheme for the ionization‐recombination cycle of the ionospheric D‐region. Input parameters for the plasma‐chemical model under different heliogeophysical conditions corresponding to selected X‐ray flares were determined by using data received from the AURA, SDO, and GOES satellites. Verification of the obtained results was carried out with use of ground‐based radiophysical measurements taken at the geophysical observatory Mikhnevo. The results obtained from a comparison of the calculated and experimental radio wave amplitude variations along six European very low frequency (VLF) paths show that the average normalized root mean square error is ∼7%, 14%, and 18% for C‐, M‐, and X‐class flares, respectively. Qualitative and quantitative analysis of the verification results for the VLF signal amplitude show good predictive capability of the model built for describing weak and moderate ionospheric disturbances.

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Correlated Disturbances of the Upper and Lower Ionosphere from Synchronous Measurements of Parameters of GNSS Signals and VLF Radio Signals

Cited by 10 publications

References 11 publications

The Influence of the Lower Ionospheric Disturbances on the Operating Conditions of Navigation Satellite Systems

The Influence of the Lower Ionospheric Disturbances on the Operating Conditions of Navigation Satellite Systems

Long‐Term Schumann Resonance Dynamics Based on Horizontal Magnetic Field Data at Mikhnevo Observatory During 2016–2020

Modeling of the Lower Ionosphere During Solar X‐Ray Flares of Different Classes

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