GraFar - Repository of the Faculty of Civil Engineering
Faculty of Civil Engineering of the University of Belgrade
    • English
    • Српски
    • Српски (Serbia)
  • English 
    • English
    • Serbian (Cyrilic)
    • Serbian (Latin)
  • Login
View Item 
  •   GraFar
  • GraFar
  • Radovi istraživača / Researcher's publications
  • View Item
  •   GraFar
  • GraFar
  • Radovi istraživača / Researcher's publications
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Behaviour of electron content in the ionospheric d-region during solar x-ray flares

Thumbnail
2016
734.pdf (535.5Kb)
Authors
Todorović-Drakul, Miljana
Cadez, V.M.
Bajcetić, J.
Popović, L. C.
Blagojević, Dragan
Nina, A.
Article (Published version)
Metadata
Show full item record
Abstract
One of the most important parameters in ionospheric plasma research, also having a wide practical application in wireless satellite telecommunications, is the total electron content (TEC) representing the columnal electron number density. The F-region with high electron density provides the biggest contribution to TEC while the relatively weakly ionized plasma of the D-region (60 km 90 km above Earth's surface) is often considered as a negligible cause of satellite signal disturbances. However, sudden intensive ionization processes, like those induced by solar X-ray flares, can cause relative increases of electron density that are significantly larger in the D-region than in regions at higher altitudes. Therefore, one cannot exclude a priori the D-region from investigations of ionospheric influences on propagation of electromagnetic signals emitted by satellites. We discuss here this problem which has not been sufficiently treated in literature so far. The obtained results are based on... data collected from the D-region monitoring by very low frequency radio waves and on vertical TEC calculations from the Global Navigation Satellite System (GNSS) signal analyses, and they show noticeable variations in the D-region's electron content (TECD) during activity of a solar X-ray flare (it rises by a factor of 136 in the considered case) when TECD contribution to TEC can reach several percent and which cannot be neglected in practical applications like global positioning procedures by satellites.

Keywords:
solar-terrestrial relations / Sun: activity / Sun: flares / Sun: X-rays, gamma rays
Source:
Serbian Astronomical Journal, 2016, 193, 11-18
Publisher:
  • Astronomska opservatorija, Beograd i Univerzitet u Beogradu - Matematički fakultet - Odeljenje za astronomiju, Beograd
Projects:
  • Astroinformatics: application of IT in astronomy and close fields (RS-44002)
  • Astrophysical Spectroscopy of Extragalactic Objects (RS-176001)
  • Influence of collisions on astrophysical plasma spectra (RS-176002)
  • Stellar physics (RS-176004)
  • Serbian geodetic infrastructure advancement for the needs of a modern state survey (RS-36020)

DOI: 10.2298/SAJ160404006T

ISSN: 1450-698X

WoS: 000392955400002

Scopus: 2-s2.0-85009736750
[ Google Scholar ]
7
9
URI
http://grafar.grf.bg.ac.rs/handle/123456789/736
Collections
  • Radovi istraživača / Researcher's publications
  • Катедра за геодезију и геоинформатику
Institution
GraFar

DSpace software copyright © 2002-2015  DuraSpace
About GraFar - Repository of the Faculty of Civil Engineering | Send Feedback

OpenAIRERCUB
 

 

All of DSpaceInstitutionsAuthorsTitlesSubjectsThis institutionAuthorsTitlesSubjects

Statistics

View Usage Statistics

DSpace software copyright © 2002-2015  DuraSpace
About GraFar - Repository of the Faculty of Civil Engineering | Send Feedback

OpenAIRERCUB