Latitudinal features of Total Electron Content over the African and European longitude sector following the St. Patrick’s day storm of 2015 |
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| Authors: | A Paul A Kascheyev M Rodriguez-Bouza K Pathak AA Ferreira D Shetti JN Yao |
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| Institution: | 1. Institute of Radio Physics and Electronics, University of Calcutta, 92 Acharya Prafulla Chandra Road, Kolkata 700009, India;2. The Abdus Salam International Centre for Theoretical Physics (ICTP), Trieste, Italy;3. Institute of Radio Astronomy, National Academy of Sciences of Ukraine (IRA NASU), Kharkiv, Ukraine;4. Department of Physics of the Earth, Astronomy and Astrophysics I, Facultad de Ciencias Físicas, University Complutense of Madrid (UCM), Ciudad Universitaria, Plaza de Ciencias 1, 28040 Madrid, Spain;5. Dept. of Applied Physics, S V National Institute of Technology, Surat 395007, India;6. Department of Electrical Engineering, University of Brasilia (UnB), 70910-900 Brasília, DF, Brazil;g. Smt. Kasturbai Walchand College, Sangli, India;h. Laboratoire de Physique de l''Atmosphère, Université Felix Houphouet Boigny, 22 BP 582 Abidjan 22, Cote d’Ivoire;i. T/ICT4D Laboratory, International Center for Theoretical Physics, Strada Costiera 11, 34014 Trieste, Italy |
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| Abstract: | GNSS TEC values have been obtained from 18 stations distributed from the magnetic equator to nearly 80°N magnetic dip in the African and west-European longitude sector corresponding to the March 17–18, 2015 geomagnetic storm. Significantly depleted ionosphere have been observed at stations north of 50°N geographic on March 18, 2015 following the above storm over a longitude swath 11.9°–21°E covering the Eastern Africa and Western European longitude sector. High ROTI values were noted on March 17th at locations around 80°N magnetic dip. Two prominent peaks in PCN were noted around 09:00 UT and 14:00 UT on March 17, 2015 and around 15:00 UT on March 18, 2015. Daytime thermospheric (O/N2) ratio was markedly less on March 18th at latitudes above 60°N geographic which is suggested to be the major driver behind depleted high latitude ionosphere during the recovery phase of the storm on March 18, 2015. |
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| Keywords: | St Patrick's day storm 2015 GNSS TEC Ionospheric response over African and European longitudes Occurrence of ionization depleted regions above 60°N geographic latitude on March 18 2015 |
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