Kazan Federal University Digital Repository

Impact of a Strong Magnetic Storm and Two X-Ray Flares on the Ionospheric HF Channel in the Summer Solstice of 2015 According to Oblique Sounding in the Eurasian Region

Show simple item record

dc.contributor.author Uryadov V.
dc.contributor.author Kolchev A.
dc.contributor.author Vertogradov G.
dc.contributor.author Vybornov F.
dc.contributor.author Egoshin I.
dc.contributor.author Sklyarevsky M.
dc.contributor.author Shumaev V.
dc.contributor.author Chernov A.
dc.date.accessioned 2018-04-05T07:09:08Z
dc.date.available 2018-04-05T07:09:08Z
dc.date.issued 2017
dc.identifier.issn 0033-8443
dc.identifier.uri http://dspace.kpfu.ru/xmlui/handle/net/129550
dc.description.abstract © 2017, Springer Science+Business Media, LLC. We present the results of observations of the impact a strong magnetic storm and two X-ray flares in the summer solstice of 2015 on the HF signal characteristics during oblique sounding of the ionosphere in the Eurasian region. It was found that the negative phase of the magnetic storm led to a strong degradation of the ionospheric channel, up to a long blackout on the paths adjacent to the subauroral latitudes. On the midlatitude paths, a decrease in the maximum observable frequency of the F layer reached 50% with respect to the average values for an undisturbed ionosphere. The propagation velocity of the negative phase of a disturbance from the subauroral to the midlatitude ionosphere is determined (it is equal to about 100 m/s). It is shown that during a magnetic storm the least observable frequency and the average signal-to-noise ratio for the propagation mode via the sporadic E s layer correlate well with the auroral AE index. Anomalous signals were detected in the main phase of the magnetic storm on the Cyprus—Rostov-on-Don path when a chirp ionosonde–radio direction finder was operated in the over-the-horizon HF radar mode. On the basis of modeling and comparison with experimental data, it is shown that the anomalous signals are due to scattering of radio waves by small-scale irregularities located in the subauroral ionospheric F region.
dc.relation.ispartofseries Radiophysics and Quantum Electronics
dc.title Impact of a Strong Magnetic Storm and Two X-Ray Flares on the Ionospheric HF Channel in the Summer Solstice of 2015 According to Oblique Sounding in the Eurasian Region
dc.type Article
dc.relation.ispartofseries-issue 5
dc.relation.ispartofseries-volume 60
dc.collection Публикации сотрудников КФУ
dc.relation.startpage 355
dc.source.id SCOPUS00338443-2017-60-5-SID85032923231


Files in this item

This item appears in the following Collection(s)

  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

Show simple item record

Search DSpace


Advanced Search

Browse

My Account

Statistics