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Alexander Koloskov

Alexander Koloskov
Institute of Radio Astronomy, Ukraine · Radiophysics of geospace

PhD, DSc

About

131
Publications
17,808
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399
Citations
Additional affiliations
June 1989 - September 2020
Institute of Radio Astronomy NAS
Position
  • Principal Investigator
April 1989 - September 2020
National Academy of Sciences of Ukraine
Position
  • Principal Investigator

Publications

Publications (131)
Article
Full-text available
Results of six-year concurrent observations of Schumann resonance at the Ukrainian “Akademik Vernadsky” Antarctic station (65.25° N, 64.25° W) and at SOUSY Arctic facility (Svalbard 78.15° N, 16.05° E) are analyzed and compared. Measurements were performed simultaneously by using similar techniques and the calibrated digital equipment. The long-ter...
Presentation
Full-text available
Results of vertical ionospheric sounding at the Ukrainian Antarctic Station Akademik Vernadsky Oleksandr Koloskov* (1, 2), Anton Kashcheyev(3), Andriy Zalizovski(1, 2, 4), Sergei Kashcheyev(2), Volodymyr Lisachenko(2), Oleksandr Bogomaz(5) (1) National Antarctic Scientific Center of Ukraine, Kyiv, Ukraine; e-mail: alexander.koloskov@gmail.com, zal...
Conference Paper
Full-text available
In 2021, the former flagship of Britain's Royal Scientific Navy RRS James Clark Ross was bought by Ukraine and renamed to Noosphere (http://uac.gov.ua/en/icebreaker-noosphere-en/). At the end of January 2022, Noosphere should depart to its first voyage from Ukraine to Antarctica under the Ukrainian flag. Currently work is underway to install a radi...
Presentation
Full-text available
Akademik Vernadsky Station as a key point for studying the global lightning activity through Ukrainian ELF-VLF magnetometers network (review) Oleksandr Koloskov* (1, 2), Yuri Yampolski(2), Oleg Budanov(2), Alexander Shvets(3), Alexander Nikolaenko(3) (1) National Antarctic Scientific Center of Ukraine, Kyiv, Ukraine; e-mail: alexander.koloskov@gma...
Presentation
Full-text available
Geospace research at the Ukrainian Antarctic Station Akademik Vernadsky (review) Oleksandr Koloskov* (1, 2), Yuri Yampolski(2), Andriy Zalizovski(1, 2, 3) (1) National Antarctic Scientific Center of Ukraine, Kyiv, Ukraine; e-mail: alexander.koloskov@gmail.com, zalizovski@gmail.com (2) Institute of Radio Astronomy of NAS of Ukraine, Kharkiv, Ukrain...
Article
The paper presents the results of ionospheric observations performed over the Ukrainian Antarctic Akademik Vernadsky station and Millstone Hill (USA). Ionospheric parameters such as peak electron density and height (hmF2 and NmF2) in October 2021 are shown and discussed. The results of the comparative analysis between observations and predictions o...
Article
We present variations in the source bearings and polarization of the horizontal magnetic field of Q bursts recorded at Antarctic station “Akademik Vernadsky” (65.2458 ° S, 64.2572 ° W). We analyzed the parameters of the “polarization ellipse” inscribed in the initial impulse of the Q-burst, which is formed by a direct wave propagating from lightnin...
Article
Full-text available
This paper describes a system for multi‐position Doppler ionosphere sounding implemented at the beginning of 2018 in the Kharkiv region of Ukraine, the data processing technique and initial results of data analysis. The system comprises a high frequency (HF) transmitter and three receiving sites making almost a right triangle with catheti of 32.8 a...
Conference Paper
Full-text available
We report on the results obtained during the June 23-26, 2020 experiments at the EISCAT heating facility aimed to: 1) explore artificial ionospheric turbulence (AIT) and stimulated electromagnetic emissions (SEE) during transmissions near the 3 rd electron gyroharmonic and upper hybrid resonance; 2) search for artificial ionospheric layers; 3) expl...
Presentation
Full-text available
We report on the results obtained during the June 23-26, 2020 experiments at the EISCAT heating facility aimed to: 1) explore artificial ionospheric turbulence (AIT) and stimulated electromagnetic emissions (SEE) during transmissions near the 3rd electron gyroharmonic and upper hybrid resonance; 2) search for artificial ionospheric layers; 3) explo...
Conference Paper
Full-text available
The paper presents and discusses the distributions of the number of transient events derived from long-term ELF records collected in the Antarctic and in the Arctic.
Presentation
Full-text available
The paper presents and discusses the distributions of the number of transient events derived from long-term ELF records collected in the Antarctic and in the Arctic.
Conference Paper
Full-text available
Multiposition Doppler HF facility for monitoring travelling ionospheric disturbances (TID) over Ukraine is in operation since January 2018. As is well known, TID are the result of atmospheric gravity waves (AGW) propagating in the ionosphere. We report on the results of reconstruction of AGW/TID in the form of perfectly reflecting moving wave surfa...
Conference Paper
Full-text available
Continuous Doppler monitoring of the propagation of HF signals from Europe and North America to the Antarctic Peninsula region has been performed at the Ukrainian Antarctic Station Akademik Vernadsky (UAS) since May 2010. Data analysis of long-term measurements shows that long-distance propagation in these directions is provided by four different m...
Article
Full-text available
The Earth–ionosphere cavity resonator is occupied primarily by the electromagnetic radiation of lightning below 100 Hz. The phenomenon is known as Schumann resonances (SR). SR intensity is an excellent indicator of lightning activity and its distribution on global scales. However, long-term measurements from high latitude SR stations revealed a pro...
Conference Paper
Full-text available
Studies of geophysical processes in the Earth-ionosphere cavity driven by the global thunderstorm activity are carried out in order both to calculate the characteristics of excitation sources and estimate field propagation parameters in the global resonator formed by the Earth 's surface and the lower ionosphere. The main sources of excitation of...
Conference Paper
Full-text available
Doppler monitoring of the propagation of HF signals from Europe and North America to the Antarctic Peninsula region has been performed continuously at the Ukrainian Antarctic Akademik Vernadsky station (UAS) since May 2010. Data analysis of long-term measurements shows that long-distance propagation in these directions is provided by four different...
Conference Paper
Full-text available
Systematic round-the-clock observations of the horizontal orthogonal components of magnetic field variations in the ELF waveband have been performed at the Ukrainian Antarctic Station "Akademik Vernadsky" (65.25оS and 64.25оW) since 2002. The ELF signals are recorded by the magnetometer facility consists of two highly sensitive low noise induction-...
Conference Paper
Full-text available
Why is the problem of studying the dynamics of global lightning activity (GLA), despite its long history, becoming more and more relevance? This is due to several, in our opinion, a number of reasons. First, thunderstorm activity is the main source of the electromagnetic background at the low altitudes of atmosphere. The frequency spectrum of a lig...
Conference Paper
Full-text available
A dedicated HF ionosphere modification campaign was carried out during 23-26 June 2020 at the EISCAT heating facility, Tromsø, Norway within the framework of the Program of Scientific collaboration between Ukraine and the EISCAT scientific association. In the course of the experiment, O-and X-mode waves at frequencies stepping by 10 kHz around the...
Conference Paper
Full-text available
Several decades ago, the main seasonal features of ionospheric manifestations of geomagnetic storms were identified, which are related to seasonal features of the global thermospheric circulation and the neutral density. However, there is a relatively small number of works devoted to investigation of manifestations of geomagnetic storms over unique...
Conference Paper
Full-text available
A significant number of modern scientific works in the field of geospace research are devoted to study of disturbed space weather effects in the ionosphere and plasmasphere. At the same time, quiet space weather conditions (especially long-term periods with quiet space weather) can be called a rare state of the near-Earth plasma environment. It is...
Conference Paper
Full-text available
Last year, an artificial neural network (ANN) was developed for identifying ordinary radio wave traces of the F2 layer (F2o) on ionograms obtained by the IPS-42 ionosonde installed at the Ukrainian Antarctic Akademik Vernadsky station (UAS). The ANN is based on the U-Net architecture and developed in Python programming language with use of the Kera...
Article
Full-text available
The article presents the developed artificial neural network for F2 ionosphere layer traces scaling on ionograms obtained using the IPS-42 ionosonde installed at the Ukrainian Antarctic Akademik Vernadsky station. The parameters of the IPS-42 ionosonde and the features of the data obtained with it, in particular the format of the output files, are...
Article
Full-text available
We present observational results of variations in the ionospheric parameters hmF2 and NmF2 over the Ukrainian Antarctic station “Akademik Vernadsky” for magnetically quiet conditions. The results of comparative analysis of observational data and the International Reference Ionosphere-2016 model predictions are presented. The main objective of this...
Article
Full-text available
Purpose: Analysis of the air temperature annual variations over different South American regions by long series of long-term meteorological observations, consideration of the physico-geographical and climatic features of the Amazonian lowlands, which affect thunderstorm activity in this region, search for the connection between seasonal variations...
Article
Full-text available
The paper aims at providing the technical information about Doppler vertical sounding of the ionosphere that started at the Ukrainian Antarctic Akademik Vernadsky station since 2017; developing the technique for processing and visualization of data of vertical sounding of the ionosphere in the form of height-time diagrams of median values of ionosp...
Article
Full-text available
Purpose: An experimental study of signatures of traveling ionospheric disturbances (TID) observed in diurnal-seasonal variations of the parameters of probe HF signals propagating on theoblique single-hop RWM–LFO radio path, derived from the yearlong monitoring data. Design/methodology/approach: A long term digital recording of the HF radio signals...
Article
The paper analyzes the records of the magnetic components of the Schumann resonance signals obtained at the Ukrainian Antarctic station “Akademik Vernadsky” (coordinates: 65.25° S, 64.25° W) from March 2002 to March 2019 and at Svalbard in the Arctic (coordinates: 78.15° N and 16.05° E) from October 2013 to June 2019. The time-course is studied of...
Article
Full-text available
The article describes the main features of upgrading the magnetometric complex based on the LEMI-025 variometer in January-April 2019 at the geomagnetic observatory (code AIA) of the Ukrainian Antarctic Akademik Vernadsky station. The observatory’s old magnetometric complex consisted of two LEMI-008 (No. 02 and No. 16) variometers and one POS-1 sca...
Article
Full-text available
This paper describes the results of the atmospherics measurements in the extremely low-frequency (ELF) and very low-frequency (VLF) frequency ranges performed at the Akademik Vernadsky station (64.26W; 65.25S) during February–April 2019. The main objective of the study was the implementation of a single-site technique for monitoring the lower ionos...
Article
Full-text available
Purpose. A qualitative and quantitative study of the correlation of space-time changes of the total electron content of the ionosphere with variations in the energetic electron flux during a significant increase of the solar wind density and velocity. Determination of the conditions when the increase of the intensity of the flux of energetic electr...
Article
Full-text available
PACS numbers: 92.60.Pw, 93.30.Bz, 93.30.Ca Purpose: Search for the connection of seasonal variations in characteristics of the Earth-ionosphere global resonator with air temperature in Africa. Comparison of results obtained in Arctica, Antarctica and in the midlatitudes of the Northern Hemisphere with the surface temperature of African continent....
Presentation
Full-text available
Continuous vertical sounding of the ionosphere at the Faraday-Akademik Vernadsky station (65.15 S, 64.16 W) occurring since the late 50s discovered an ionospheric anomaly that now is widely known as a “Weddell Sea anomaly”. The essence of this phenomenon is that the night values of the critical frequency of the ionosphere exceed the midday ones in...
Conference Paper
Full-text available
The aim of this work is testing a new ELF-VLF receiving and analyzing system for registration and analysis of natural pulsed electromagnetic signals – tweek-atmospherics, and signals from VLF radio stations in the frequency range from 700 Hz to 24 kHz at “Academik Vernadsky” station.
Conference Paper
Full-text available
We present the results of investigations of AGW/TID over the Antarctic Peninsula and Europe obtained using two different techniques of RF remote sensing.  Multi-position coherent HF system was installed in Antarctica at the Akademik Vernadsky (Ukraine) and Palmer (USA) Antarctic stations, and at Kharkiv region of Ukraine. Several GNSS receivers ar...
Conference Paper
The state of the near-Earth space environment, including the biosphere, is determined by many factors. Traditionally, we take into consideration only "strong" factors that are given to a person in feelings. This is-illumination, gravity, temperature, pressure, humidity, chemical composition and convection of air. A number of the latter are included...
Conference Paper
Full-text available
The state of the near-Earth space environment, including the biosphere, is determined by many factors. Traditionally, we take into consideration only "strong" factors that are given to a person in feelings. This is-illumination, gravity, temperature, pressure, humidity, chemical composition and convection of air. A number of the latter are included...
Article
A state of the ionosphere can be effectively studied using electromagnetic signals received from global navigation satellite systems (GNSS). Utilization of the dual frequency observations allows estimating values of the total electron content (TEC). They can be used for a number of scientific studies such as detection and monitoring of traveling io...
Conference Paper
According to the long-term monitoring of the natural noise of the extremely low frequency (ELF) range at the Ukrainian Antarctic Akademik Vernadsky station, at the Low Frequency Observatory (LFO) of the IRA NAS of Ukraine in the Martova village, as well as on the SOUSY Observatory at Svalbard, Norway, seasonal variations in the intensity of the fir...
Conference Paper
Full-text available
The work presents the results of diagnostics of atmospheric gravity waves (AGW) and associated with them travelling ionospheric disturbances (TID) over the Antarctic Peninsula obtained using two different RF remote sensing techniques. The first one is based on multi-positional GNSS measurements of total electron content (TEC). The second technique...
Presentation
Full-text available
A technique for multiposition Doppler HF sounding of the ionosphere that use the emission of broadcasting radio-stations as probing signals is developed in the Institute of Radio Astronomy of National Academy of Sciences of Ukraine (IRA NASU) during some last decades. At present the Internet-controlled receiving sites designed by IRA NASU are locat...
Presentation
Full-text available
Presentation is devoted to to the processing and analysis of signals from RWM radiostation of the exact time and frequency service on two radio lines - high-latitude (RWM-Tromso) and mid-latitude (RWM-LFO). The signals were continuously registered at a frequency of 9.996 MHz during 2013 by two receiving stations located at the Low-frequency Observa...
Conference Paper
Full-text available
NEW DIGITAL IONOSONDE DEVELOPED FOR UKRAINIAN ANTARCTIC STATION “ACADEMIC VERNADSKY” Main ionosonde of Ukrainian Antarctic Station (UAS) “Academic Vernadsky” works at the station since 1982. It is out of date and require frequent repairing. That’s why IRA NASU developed new modern digital device for ionosperic sounding. It was installed at UAS and...
Conference Paper
Full-text available
MULTIPOSITIONAL - ANTARCTICA, UKRAINE, ARCTIC ELF DIAGNOSTICS OF GLOBAL THUNDERSTORM ACTIVITY (RESULTS AND PROSPECTS) Global thunderstorm activity (GTA) is connected with powerful dynamic processes in the Earth's atmosphere and can be used as an indicator of climate change. One of the effective remote methods of its observation is the monitoring o...
Article
Full-text available
A new super-long-range wave propagation technique was implemented at different High Frequency (HF) heating facilities. The HF waves radiated by a powerful heater were scattered into the ionospheric waveguide by the stimulated field aligned striations. This waveguide was formed in a valley region between the E-and F-layers of the ionosphere. The wav...
Article
Full-text available
We present ionospheric observational results obtained over Ukrainian Antarctic Akademik Vernadsky station. Ionospheric parameters (peak electron density and height, electron density and electron and ion temperatures in the topside) during the period near the local winter solstice in the Southern Hemisphere (June 28—29, 2019) are considered. The mai...
Conference Paper
Full-text available
Ionospheric HF sounding observations made during 2015-2017 in Antarctic Peninsula region are analyzed with the emphasis on the travelling ionospheric disturbances phenomenology. Drake Passage in Antarctica generates severe tropospheric disturbances making it a good candidate for studying tropospheric-ionospheric interaction and propagation of the w...
Article
Full-text available
Purpose: Diagnostics of regular and sporadic ionospheric variations using coherent systematic monitoring of spectral characteristics of the probe HF signals on the inclined singlehop radio paths. Design/methodology/approach: Two HF receiving stations located at the Low Frequency Observatory of the Institute of Radio Astronomy, National Academy of...
Article
Full-text available
Main objective of the study: сorrelation study of long-term seasonal variations of the intensity of the global electromagnetic (Schumann) resonance in the Earth-ionosphere cavity and the air temperature and in African center of the global thunderstorm activity. Methods: the correlation analysis of the time series was used. By using the 13-year data...
Article
Full-text available
Vertical sounding of the ionosphere (VSI) is the oldest and still one of the most widely used methods of diagnostics of the Earth atmosphere’s plasma. Today there exists a worldwide network of the VSI sounders developed by different research groups; however, the existing coverage is still not sufficient for modern scientific and operational purpose...
Article
Full-text available
The background seasonal and diurnal variations of characteristics of HF radio signals in frequency and time domains propagated at the long radio paths are studied. The signals transmitted by RWM (frequencies 4996, 9996, and 14996 kHz) and CHU (frequencies 3330, and 7850 kHz) time service radio stations were received at the Ukrainian Antarctic Stati...
Article
Full-text available
Purpose: Correlation study of long-term seasonal variations of intensity of the global electromagnetic (Schumann) resonance in the Earth-ionosphere cavity and the air temperature for the African center of the global thunderstorm activity. Design/methodology/approach: The correlation analysis of the time series was used. By using the 13-year data (s...
Conference Paper
The report presents the results and prospects of geospace research, which are carried out in Antarctica, Ukraine and the Arctic. The relevance and productivity of such studies conducted simultaneously in high and medium latitudes to form the image of "space weather" are formulated. The uniqueness of location of Ukrainian Antarctic station Akademik...
Article
Continuous Schumann resonance (SR) observations open the wide possibilities for permanent monitoring of the lower ionosphere and global thunderstorm activity. The existing methods for monitoring the thunderstorms with the help of SR were developed in detail only for the point source models. However, such customary models describe the sources of rad...
Article
Purpose: Correlation study of long-term seasonal variations of intensity of the global electromagnetic (Schumann) resonance in the Earth-ionosphere cavity and the air temperature for the African center of the global thunderstorm activity. Design/methodology/approach: The correlation analysis of the time series was used. By using the 13-year data (s...
Article
Full-text available
Organization of continuous observations of Schumann resonance (SR) opens up the possibility of permanent monitoring the lower ionosphere and global storms. The existing methods for monitoring thunderstorm activity with SR are developed in detail only for point sources. However, the current models of radiation sources are too simplistic. In this con...