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180
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Introduction
Scientific interests include the ionosphere, GNSS, Space weather, GNSS positioning, ionosperic irregularities. Some focus is directed to absolute total electron content measurements.
Currently our groupe is working on SIMuRG (System for Ionosphere Monitoring and Research from GNSS) project (https://simurg.iszf.irk.ru/).
Additional affiliations
September 2006 - present
December 2005 - present
Education
September 2001 - June 2006
Publications
Publications (180)
For decades, GNSS code measurements were much noisier than phase ones, limiting their applicability to ionospheric total electron content (TEC) studies. Ultra-wideband AltBOC signals changed the situation. This study revisits the Galileo E5 and BeiDou B2 AltBOC signals and their potential applications in TEC estimation. We found that TEC noises are...
Plain Language Summary
On 18 November 2023, SpaceX launched the Starship, the tallest and the most powerful rocket ever built. About 2 min and 40 s after the liftoff, the Super Heavy engine separated from the Starship spacecraft and exploded at an altitude of 90 km. The main core Starship continued to rise to 149 km and exploded as well. The rocket...
We presented the results of comparative analysis of geomagnetic events identified by various indices. A previously developed technique is used to identify magnetic storms by the Dst index. As a basis for identification, we chose the previously developed method for identifying geomagnetic storms based on the Dst index. A similar method was implement...
Space‐weather conditions can often have a detrimental impact on satellite communications and limited experimental data has made it challenging to understand the complex processes that occur in the upper atmosphere. To overcome this challenge, we utilized a coordinated multi‐instrumental dataset consisting of GNSS airglow remote sensing, ionosonde,...
Scientists and engineers use data utilize global navigation satellite systems (GNSSs) for a multitude of tasks: autonomous navigation, transport monitoring, construction, GNSS reflectometry, GNSS ionosphere monitoring, etc [...]
PPP–RTK, a synthesis of precise point positioning (PPP) and real-time kinematic (RTK) techniques, achieves fast integer ambiguity resolution-enabled positioning using, among others, satellite clocks, biases, and ionospheric corrections generated in a reference network. When formulating a network model to estimate these products, one usually conside...
The Earth’s ionosphere experiences forcing from above and below and varies in different periods. We analyzed the dynamics of the ionospheric global and regional electron contents (GEC and REC) in solar cycles 23/24 (SC23/SC24) and the first part of solar cycle 25 (SC25). We considered several methodological issues for GEC calculations and created a...
The negative impacts of space weather conditions on human activity have become a vital concern over the last decades, as humans increasingly use satellite communications, Positioning-Navigation-Timing (PNT) with Global Navigation Satellite Systems (GNSS), Earth’s observation and forecasting with in-situ and remote sensing satellites, and countless...
Global navigation satellite systems (GNSS) provide a great data source about the ionosphere state. These data can be used for testing ionosphere models. We studied the performance of nine ionospheric models (Klobuchar, NeQuickG, BDGIM, GLONASS, IRI-2016, IRI-2012, IRI-Plas, NeQuick2, and GEMTEC) both in the total electron content (TEC) domain—i.e.,...
Two strong earthquakes occurred in Turkey on 6 February 2023, at 01:17:34 (nighttime, Mw = 7.8) and at 10:24:50 UT (daytime, Mw = 7.5). The seismo-ionospheric impact is an important part of the near-Earth environment state. This paper provides the first results on the ionospheric effects associated with the aforementioned earthquakes. We used data...
Natural hazards and geomagnetic disturbances can generate a combination of atmospheric and ionospheric waves of different scales. The carrier phase of signals of global navigation satellite system (GNSS) can provide the highest efficiency to detect and study the weak ionospheric disturbances in contrast to total electron content (TEC) and TEC-based...
The 2022 year ended and I would share my TOP-5 papers published in GPS solutions in 2022. Also, I would mention 3 articles published in 2023.
GNSS performance is examined under both extreme and dangerous solar radio bursts and strong magnetic storms during the period from 2001 till 2020. Our experimental observations corroborate a negative effect of space weather factors on GNSS operation in the stand-alone and differential navigation modes. It was proved that the main causes of that are...
The chapter describes methodology of ionospheric TEC reconstruction based on double frequency and single-frequency measurements of carrier phase and code delay of GNSS signals. Typical ionospheric scintillation indices such as ROTI, S4 and σφ are considered and its computation procedures described. New ionospheric scintillation index which is the s...
To provide GNSS/SBAS reliable performance under Space Weather impacts several solutions are considered. The system of technical-organizing measures that will enable to improve the GNSS performance quality with allowance for current helio-geophysical conditions is proposed. Exact fore- and nowcasting positioning quality under geomagnetic disturbance...
During emergency events, we could significantly depend on the stable operation of radio communication, navigation, and radars. The ionosphere, especially its auroral regions, significantly influences radio systems, which is why scientists and engineers create systems to monitor these regions. Using data from the global GNSS network, we analyzed the...
There are significant challenges to model the ionosphere due to different anomalies, especially under the increasing requirements for precision level. We used network theory to construct an ionospheric network analysis based on the data of global ionospheric maps for the period from 1998 to 2015. The network approach revealed different domains in t...
Typically, navigation software processes global navigation satellite system (GNSS) phase observables along with the code observables to achieve high-precision positioning. However, the unmodeled code-related errors, typically multipath effects, may deteriorate the positioning performance. Such effects are well known for the second generation BeiDou...
We analyzed the characteristics of small-scale wave disturbances emerging during the evolution and transformation of the jet stream (JS) in the winter stratosphere and the lower mesosphere of the northern hemisphere, including the periods of sudden stratospheric warming (SSW) events. Continuous generation of small-scale wave disturbances is shown t...
Currently, the majority of users of global navigation satellite systems (GNSS) still apply single frequency equipment to estimate their coordinates. Since the ionosphere introduces a significant delay to the GNSS signals, single-frequency satellite measurements require a regular correction to remove an error occurring due to ionospheric propagation...
The auroral oval is a region of footprints where configuration of the Earth’s magnetic field lines is such as energetic particles could penetrate into the denser part of the ionosphere. The auroral oval
features the most complex ionospheric processes. In this region intensive small-scale ionospheric irregularities exist during calm and disturbed ge...
The ionospheric response and the associated mechanisms to geomagnetic storms are very complex, particularly during the February 2014 multiphase geomagnetic storm. In this paper, the low-latitude ionosphere responses and their coupling mechanisms, during the February 2014 multiphase geomagnetic storm, are investigated from ground-based magnetometers...
The paper considers an experimental complex of the Shared Research Facilities "The Angara" of ISTP SB RAS. Although the centre aims to study Near-Earth space, scientists could use some equipment for research in geodynamics. We mainly described the Siberian network of receivers of signals from global navigation satellite systems SibNet that currentl...
Monitoring the Earth's ionosphere is an important, fundamental and applied problem. Global Navigation Satellite Systems (GNSS) provide a way of measuring the ionospheric total electron content (TEC), but real-time single-station absolute TEC measurements are still a problem. This study describes a single-station system to measure the absolute TEC,...
The report briefly reviews my articles published in peer-review journals in 2021.
We use ground‐based (GNSS, SuperDARN, and ionosondes) and space‐borne (Swarm, CSES, and DMSP) instruments to study ionospheric disturbances due to the 25–26 August 2018 geomagnetic storm. The strongest large‐scale storm‐time enhancements were detected over the Asian and Pacific regions during the main and early recovery phases of the storm. In the...
GNSS technologies have outgrown their initial purpose (providing navigation itself) and become one of the driving factors in the international technological progress. Thereby, providing the required quality of GNSS measurements to solve applied and research issues acquires a special urgency. Hence, there comes a fundamental scientific problem. One...
Abstract: The term deviation frequency (fd) denotes the boundary between the variable part of the amplitude and phase scintillation spectrum and the part of uninformative noises. We suggested the concept of the “characteristic deviation frequency” during the observation period. The characteristic deviation frequency is defined as the most probable...
The term deviation frequency denotes the boundary between the variable part of the amplitude and phase scintillation spectrum and the part of uninformative noises. We suggested the concept of the “characteristic deviation frequency” during the observation period which is defined as the most probable value of the deviation frequency under current lo...
The auroral oval is a region of footprints of the Earth's magnetic field lines associated with high energy plasma. The high energetic charged particles penetrate into the atmosphere in this region producing irregularities. The oval origin irregularities affect the radio wave propagation degrading radio system operation. For scientific and technical...
Global navigation satellite system signals are known to be an efficient tool to monitor the Earth ionosphere. We suggest Galileo E5 AltBOC phase and pseudorange observables-a single-frequency combination-to estimate the ionospheric total electron content (TEC). We performed a one-month campaign in September 2020 to compare the noise level for diffe...
Extreme space weather events affect the stability and quality of the global navigation satellite systems (GNSS) of the second generation (GPS, GLONASS, Galileo, BeiDou/Compass) and GNSS augmentation. We review the theory about mechanisms behind the impact of geomagnetic storms, ionospheric irregularities, and powerful solar radio bursts on the GNSS...
Extreme space weather events affect the stability and quality of the global navigation satellite systems (GNSS) of the second generation (GPS, GLONASS, Galileo, BeiDou/Compass) and GNSS augmentation. We review the theory about mechanisms behind the impact of geomagnetic storms, ionospheric irregularities, and powerful solar radio bursts on the GNSS...
Mid-term report to International Association of Geodesy (IAG) Inter-Commission Committee on Theory (ICCT) and IAG Global Geodetic Observing System (GGOS), Focus Area on Geodetic Space Weather Research (FA-GSWR). This report focuses on some selected scientific outcomes of the IAG Joint Study Group 1 “Coupling processes between Magnetosphere, Thermos...
A Solar Radio Burst (SRB) is one of the most severe natural hazards affecting the performance of the global navigation satellite systems (GNSS). Considering the influence of different threat factors, the GNSS developers upgrade the systems to amend the accuracy and noise-proof features of the systems. In particular, GPS gradually replaces “old” sat...
Global navigation satellite systems (GNSS), such as GPS, GLONASS, Galileo, and Bei-Dou/Compass are widely used for solving a variety of research and applied problems. This work considers the use of GNSS signals for monitoring of the ionosphere to provide an ionospheric error correction in radio-engineering systems in quasireal time. The problems ar...
EXtreme Gradient Boosting over Decision Trees (XGBoost or XGBDT) is a powerful tool to model a wide range of processes. We propose a new approach to create a global total electron content model, using machine-learning-based techniques, in particular, gradient boosting. The model is based on the Global Ionospheric Maps computed by Universitat Politè...
In the original article published, the references Wang et al. 2016a and Wang et al. 2016b are incorrect.
We studied the effects of the 17 March 2015 geomagnetic storm on the GPS single-frequency positioning. We used data from GPS receivers located at different latitudes in the American and Asian regions. Analysis involved coordinates estimation based on different ionosphere corrections: Klobuchar model (GPS), GEMTEC (Global empirical model of total el...
Geomagnetic storm is one of the most powerful factors affecting the state of the Earth’s ionosphere. Revealing the significance of formation mechanisms for ionospheric storms is still an unresolved problem. The purpose of the study is to obtain a statistical pattern of the response in regional electron content to geomagnetic storms on a global scal...
Global navigation satellite systems (GNSS) allow estimating total electron content (TEC). However, it is still a problem to calculate absolute ionosphere parameters from GNSS data: negative TEC values could appear, and most of existing algorithms does not enable to estimate TEC spatial gradients and TEC time derivatives. We developed an algorithm t...
This study is aimed at statistically analyzing the ionospheric response to geomagnetic storms based on the data from the global ionospheric maps (GIMs). The global electron content and average zonal values of the total electron content for five latitudinal zones (equatorial zone, mid-latitude zones of the Northern and Southern Hemispheres, and high...
The development of new devices for research in physics of the upper atmosphere and near-Earth space, which can be used to carry out controlled experiments on the modification of the ionosphere by powerful short-wave radiation, is an urgent task of modern solar-terrestrial physics, space weather, operation of satellite constellations in near-Earth s...
The development of new devices for research in physics of the upper atmosphere and near-Earth space, which can be used to carry out controlled experiments on the modification of the ionosphere by powerful short-wave radiation, is an urgent task of modern solar-terrestrial physics, space weather, operation of satellite constellations in near-Earth s...
Small-scale ionospheric irregularities affect navigation and radio telecommunications. We studied small-scale irregularities observed during the 22 June 2015 geomagnetic storm and used experimental facilities at the Institute of Solar-Terrestrial Physics of the Siberian Branch of the Russian Academy of Sciences (ISTP SB RAS) located near Irkutsk, R...
The global navigation satellite system accuracy and the possibility to actively affect it is quite a relevant problem. Based on two experimental campaigns (2010 and 2016), we analyzed the GPS positioning accuracy with forcing from the Sura high-power HF radiation. Analysis of the positioning error variations for 14 stations at different distances f...
Currently, more than 6000 operating GNSS receivers deliver observations to multiple servers. Ionospheric data are derived from these measurements providing outstanding space coverage and time resolution. There are about 200 million independent measurements daily. Researchers need sophisticated software tools to deal with such a large amount of data...
Over recent years, global navigation satellite systems (GNSSs) have been increasingly used to study near-Earth space. The basis for such studies is the total electron content (TEC) data. Standard procedures for detecting TEC wave signatures include variation selection and detrending. Our experience showed that the inaccurate procedure causes artifa...
Information about recent activities and future works of the Join Study Group 1: Coupling processes between magnetosphere, thermosphere, and ionosphere. This group is implemented at the International Association of Geodesy (IAG) Inter-Commission Committee on Theory (ICCT); joint with IAG Global Geodetic Observing System (GGOS), Focus Area on Geodeti...
The 2020 New Year has just begun, but GPS solutions have prepared several interesting papers. I would like to share my TOP-5 papers published in the GPS solutions in 2020 and in 2019.
Based on the data from dual-frequency receivers of global navigation satellite systems (GNSS), we analyze the changes in GNSS positioning accuracy during the August 25-26, 2018 strong geomagnetic storm on a global scale. The storm is one of the strongest geomagnetic events of the solar cycle 24. To analyze the positioning quality, we calculated coo...
Describing the current ionospheric conditions is crucial to solving problems of radio communication, radar, and navigation. Techniques to update ionospheric models using current measurements found a wide application to improve the ionosphere description. We present the results of updating the NeQuick and IRI-Plas empirical ionosphere models using t...
The carrier phase observable is the most preferable means for observation of ionospheric scintillation events. As the ionospheric scintillations show different features at different GNSS frequencies the single-frequency data should be used for complex analysis and data interpretation. The second-order derivative of the GPS signal carrier phase is s...
Using a global, self-consistent model of the thermosphere, ionosphere, and protonosphere, as well as satellite and radar data, the spatiotemporal extent of the ionospheric winter anomaly is studied. It is shown that the morphological features (longitudinal variation and dependence on solar activity) of the manifestations of winter anomaly in the to...
We study changes in the level of correlation between long-term series of total electron content (TEC), plasmasphere electron content (PEC) and indices of solar and geomagnetic activity. Vertical total electron content data are calculated from phase dual-frequency measurements of global navigation satellite systems. To calculate PEC, we use ionosphe...
In 2011, ISTP SB RAS began to deploy a routinely operating network of receivers of global navigation satellite system signals. To date, eight permanent and one temporal sites in the Siberian region are operating on a regular basis. These nine sites are equipped with 12 receivers. We use nine multi-frequency multi-system receivers of Javad manufactu...