Solnechno-Zemnaya Fizika最新文献_第4页

Manifestation of solar wind corotating interaction regions in GCR intensity variations 太阳风自转相互作用区域在GCR强度变化中的表现

Solnechno-Zemnaya Fizika Pub Date : 2023-03-28 DOI: 10.12737/szf-91202302

M. Krainev, M. Kalinin, G. Bazilevskaya, A. Svirzhevskaya, N. Svirzhevsky, Xi Luo, O. Aslam, F. Shen, M. D. Ngobeni, M. Potgieter

引用次数: 1

Studying the response of the mid-latitude ionosphere of the Northern Hemisphere to magnetic storms in March 2012 研究2012年3月北半球中纬度电离层对磁暴的响应

Solnechno-Zemnaya Fizika Pub Date : 2022-12-24 DOI: 10.12737/szf-84202204

M. Chernigovskaya, B. Shpynev, D. Khabituev, K. Ratovsky, A. Belinskaya, A. Stepanov, V. Bychkov, Svetlana D. Grigor’eva, V. Panchenko, J. Mielich

{"title":"Studying the response of the mid-latitude ionosphere of the Northern Hemisphere to magnetic storms in March 2012","authors":"M. Chernigovskaya, B. Shpynev, D. Khabituev, K. Ratovsky, A. Belinskaya, A. Stepanov, V. Bychkov, Svetlana D. Grigor’eva, V. Panchenko, J. Mielich","doi":"10.12737/szf-84202204","DOIUrl":"https://doi.org/10.12737/szf-84202204","url":null,"abstract":"We have studied variations in ionospheric and geomagnetic parameters in the Northern Hemisphere during a series of magnetic storms in March 2012 by analyzing data from the Eurasian mid-latitude ionosonde chain, mid- and high-latitude chains of magnetometers of the global network INTERMAGNET. We have confirmed manifestations of the longitude inhomogeneity of ionospheric effects, which is associated with the irregular structure of the longitudinal variability of geomagnetic field components. The complex physics of the long magnetically disturbed period in March 2012 with switching between positive and negative phases of the ionospheric storm in the same period of the magnetic storm for different spatial regions is emphasized. The change in the effects of the ionospheric storm during this period might have been associated with the superposition in the mid-latitude region of the competing processes affecting the ionospheric ionization whose sources were in the auroral and equatorial ionosphere. We have compared the scenarios for the development of ionospheric disturbances under equinox conditions during magnetic storms in March 2012, October 2016, and March 2015.","PeriodicalId":351867,"journal":{"name":"Solnechno-Zemnaya Fizika","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124264587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Geomagnetic indices ASY-H and SYM-H and their relation to interplanetary parameters 地磁指数ASY-H和SYM-H及其与行星际参数的关系

Solnechno-Zemnaya Fizika Pub Date : 2022-12-24 DOI: 10.12737/szf-84202203

Georgy Makarov

引用次数: 0

The first comparative analysis of meteor echo and sporadic scattering identified by a self-learned neural network in EKB and MAGW ISTP SB RAS radar data 首次对比分析了EKB和MAGW ISTP SB RAS雷达数据中流星回波和自学习神经网络识别的零星散射

Solnechno-Zemnaya Fizika Pub Date : 2022-12-24 DOI: 10.12737/szf-84202206

O. Berngardt

{"title":"The first comparative analysis of meteor echo and sporadic scattering identified by a self-learned neural network in EKB and MAGW ISTP SB RAS radar data","authors":"O. Berngardt","doi":"10.12737/szf-84202206","DOIUrl":"https://doi.org/10.12737/szf-84202206","url":null,"abstract":"The paper describes the current version (v.1.1) of the algorithm for automatic classification of signals received by ISTP SB RAS decameter coherent scatter radars. The algorithm is a self-learning neural network that determines the type of scattered signals from the results of physical modeling of radio wave propagation, using radar data and international reference models of the ionosphere and geomagnetic field. According to MAGW and EKB ISTP SB RAS radar data for 2021, the algorithm self-learns to classify scattered signals into initially unknown classes based on physically interpreted parameters of radio wave propagation and data measured by the radar, with 15 frequently observed out of 20 possible hidden classes identified, 14 of which can be interpreted from a physical point of view. To demonstrate the operation of the algorithm, we present the first statistical analysis of observations of signals assigned by the algorithm to classes which we interpret as scattering by meteor trails and scattering with the sporadic E layer respectively. Through a statistical analysis of EKB and MAGW radar data during 2021–2022, we demonstrate the range-altitude characteristics of signals of these types. A correlation is shown between the hourly average numbers of observations of both classes, as well as between the hourly average line-of-sight velocities obtained for both classes. The results obtained make it possible to interpret these classes as a meteor echo and sporadic scattering respectively, and to use radar data to study the interaction between the neutral atmosphere (studied from meteor scattering data) and the lower ionosphere (studied from observations of sporadic scattering). Currently, this classification algorithm works in ISTP SB RAS radars in automatic mode.","PeriodicalId":351867,"journal":{"name":"Solnechno-Zemnaya Fizika","volume":"60 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123226170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Wave activity of the mesosphere in the planetary wave range according to OH (3-1) emission observations at Maimaga and Tiksi stations for 2015–2020 2015-2020年Maimaga站和Tiksi站OH(3-1)发射观测资料在行星波范围内的中间层波活动

Solnechno-Zemnaya Fizika Pub Date : 2022-12-24 DOI: 10.12737/szf-84202209.

V. Sivtseva, P. Ammosov, G. Gavrilyeva, A. Ammosova, I. Koltovskoi

引用次数: 0

Statistical relation of traveling ionospheric disturbances with neutral wind and disturbances in the stratosphere 带中性风的电离层扰动与平流层扰动的统计关系

Solnechno-Zemnaya Fizika Pub Date : 2022-12-24 DOI: 10.12737/szf-84202208

M. Tolstikov, A. Oinats, M. Artamonov, I. Medvedeva, K. Ratovsky

引用次数: 1

Peculiarities of ULF wave characteristics in a multicomponent ionospheric plasma 多分量电离层等离子体中超短波波特性的特性

Solnechno-Zemnaya Fizika Pub Date : 2022-12-24 DOI: 10.12737/szf-84202205

Dmitriy Kotik, E. Orlova, V. Yashnov

{"title":"Peculiarities of ULF wave characteristics in a multicomponent ionospheric plasma","authors":"Dmitriy Kotik, E. Orlova, V. Yashnov","doi":"10.12737/szf-84202205","DOIUrl":"https://doi.org/10.12737/szf-84202205","url":null,"abstract":"We have examined the properties of low-frequency electromagnetic waves in multicomponent ionospheric plasma in the 1–30 Hz band, using the magnetoionic theory. Complex permittivity tensor components and refractive indices of normal waves (ordinary and extraordinary) were calculated at altitudes from 80 to 750 km. The calculations show that the refractive indices are highly dependent on frequency and height. Polarization of ordinary and extraordinary waves is elliptical over the entire range of the frequencies investigated. The refractive index and the polarization of normal waves are demonstrated to tend to magnetohydrodynamic (MHD) values only at frequencies lower than 1 Hz. The group velocity vector of an extraordinary wave is not directed along the magnetic field, as follows from the MHD approximation, but it lies inside a cone within ±(5–10) degrees, depending on frequency. The group velocity vector of an ordinary wave is practically independent of the angle with the geomagnetic field as in the MHD approximation. The proposed method for calculating the characteristics of normal waves in the ionosphere can be used to study ULF wave propagation from both natural and artificial ionospheric sources, which arise under the action of powerful HF radio waves in the lower and upper ionosphere.","PeriodicalId":351867,"journal":{"name":"Solnechno-Zemnaya Fizika","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115273395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ionospheric response to the passage of typhoons observed by subionospheric VLF radio signals 亚层VLF无线电信号观测到的台风通过电离层的响应

Solnechno-Zemnaya Fizika Pub Date : 2022-09-30 DOI: 10.12737/szf-83202208

S. Shalimov, M. Solovieva

{"title":"Ionospheric response to the passage of typhoons observed by subionospheric VLF radio signals","authors":"S. Shalimov, M. Solovieva","doi":"10.12737/szf-83202208","DOIUrl":"https://doi.org/10.12737/szf-83202208","url":null,"abstract":"The response of the lower ionosphere to the passage of several dozen typhoons has been studied using a regional network of VLF stations in the Russian Far East. The experimental data presented in all cases clearly demonstrates wavelike disturbances of the subionospheric VLF signal amplitude and phase during the active stage of typhoons crossing radio paths. With the exception of magnetoactive and seismoactive days, this means that the disturbances generated by a typhoon, when propagating into the upper ionosphere, pass through the lower ionosphere, causing corresponding disturbances in the amplitude and phase of the VLF signal. Spectral analysis shows that the range of the wave disturbances detected corresponds to the periods of atmospheric internal gravity waves (IGW). A mechanism of the action of IGWs on the lower ionosphere is proposed which allows us to interpret the VLF signal phase variations observed. According to this mechanism, the action of IGW on the lower ionosphere is caused by polarization fields arising during the wave motion of plasma in the lower part of the F layer. These fields projected along geomagnetic field lines into the lower ionosphere cause the upper wall of the Earth—ionosphere waveguide to rise or fall.","PeriodicalId":351867,"journal":{"name":"Solnechno-Zemnaya Fizika","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117246853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Structure of groups of eigenfrequencies in spectra of geomagnetic pulsations in the nightside magnetosphere 夜侧磁层地磁脉动谱中特征频率群的结构

Solnechno-Zemnaya Fizika Pub Date : 2022-09-30 DOI: 10.12737/szf-83202207

A. Polyakov

引用次数: 0

Possibility of using GLM data for studying plasma phenomena 利用GLM数据研究等离子体现象的可能性

Solnechno-Zemnaya Fizika Pub Date : 2022-09-30 DOI: 10.12737/szf-83202212

A. Filatov

引用次数: 0