Zobrazeno 1 - 10
of 58
pro vyhledávání: '"D. V. Blagoveshchensky"'
Publikováno v:
Annales Geophysicae, Vol 36, Pp 1057-1071 (2018)
The study is focused on the analysis of total electron content (TEC) variations during six geomagnetic storms of different intensity: from Dstmin = −46 nT to Dstmin = −223 nT. The values of TEC deviations from its 27-day median value (δTE
Externí odkaz:
https://doaj.org/article/064acc527e0b47eca9466bfec37b8fca
Publikováno v:
Annales Geophysicae, Vol 26, Pp 1479-1490 (2008)
The impact of 14 geomagnetic storms from a list of CEDAR, GEM and ISTP storms, that occurred during 1997–1999, on radio propagation conditions has been investigated. The propagation conditions were estimated through variations of the MOF and LOF
Externí odkaz:
https://doaj.org/article/3afef7adefb64f98814726d22e9c48c0
Publikováno v:
Annales Geophysicae, Vol 24, Pp 1839-1849 (2006)
The impact of the main ionospheric trough, sporadic structures, gradients and inhomogeneities of the subpolar ionosphere during substorms on the signal amplitude, azimuthal angles of arrival, and propagation modes for the radio path Ottawa (Canada
Externí odkaz:
https://doaj.org/article/bd94f3f36df04dd59ad134f5500d850c
Autor:
D. V. Blagoveshchensky, M. Lester, V. A. Kornienko, I. I. Shagimuratov, A. J. Stocker, E. M. Warrington
Publikováno v:
Annales Geophysicae, Vol 23, Pp 1697-1709 (2005)
Multi-diagnostic observations, covering a significant area of northwest Europe, were made during the magnetic storm interval (28–29 April 2001) that occurred during the High Rate SolarMax IGS/GPS-campaign. HF radio observations were made with ve
Externí odkaz:
https://doaj.org/article/05daea40084540f48ba92bd4cd6642f7
Publikováno v:
Annales Geophysicae, Vol 21, Pp 1141-1151 (2003)
The temporal and spatial behaviour of the ionospheric parameters foF2 and h'F during isolated substorms are examined using data from ionospheric stations distributed across Europe and western Asia. The main purpose is finding the forerunners of
Externí odkaz:
https://doaj.org/article/aff714b5c16f45719f650ea47906f3b4
Autor:
D. V. Blagoveshchensky, O. A. Maltseva
Publikováno v:
Geomagnetism and Aeronomy. 62:58-65
Abstract A model of the medium of the ionosphere and magnetosphere, including the distributions of the concentrations and temperatures, collision frequencies, and magnetic field parameters, is described. The ray-tracing method was used to simulate th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7c14b17f4c00efa59b25e557028bc443
https://doi.org/10.1134/s0016793222020049
https://doi.org/10.1134/s0016793222020049
Publikováno v:
Advances in Space Research. 69:176-186
Absorption level by riometer was estimated at high-latitudes during four moderate magnetic storms that occurred in 2018 and were similar by several features. The data of riometer absorption at 30 MHz was obtained from Sodankyla Geophysical Observator
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::61f931224bd868e56082202b14ed81ed
https://doi.org/10.1016/j.asr.2021.10.001
https://doi.org/10.1016/j.asr.2021.10.001
Autor:
M. A. Sergeeva, D. V. Blagoveshchensky
Publikováno v:
Pure and Applied Geophysics. 177:4971-4982
The impact of geomagnetic substorms on radio propagation within the high-frequency (HF) range was analyzed using oblique ionospheric sounding data. These data were obtained from the unique system of radio paths that covers the whole region of the Rus
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b68346edcefa44468f7d4c9d9eb85182
https://doi.org/10.1007/s00024-020-02539-4
https://doi.org/10.1007/s00024-020-02539-4
Autor:
D. V. Blagoveshchensky
Publikováno v:
Cosmic Research. 58:234-241
A wide range of changes in parameters of the low-latitude ionosphere has been revealed during the periods of three intense geomagnetic storms that occurred in different seasons of 2015. Ionospheric parameters, according to the data from ionosondes (i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4389a4995a11b8a591b1cba4c924bc55
https://doi.org/10.1134/s0010952520040024
https://doi.org/10.1134/s0010952520040024
Autor:
M. A. Sergeeva, D. V. Blagoveshchensky
Publikováno v:
Advances in Space Research. 65:11-18
Variations of ionospheric parameters Total Electron Content (TEC) by GNSS, critical frequency (foF2) by vertical sounding and electron density (Ne) by low-altitude satellite were studied at high, mid and low latitudes of the European sector during th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::129fb642321c00fc3d41d14a43132a69
https://doi.org/10.1016/j.asr.2019.07.044
https://doi.org/10.1016/j.asr.2019.07.044