Physical Science International Journal最新文献

Determination of the Seebeck Coefficient and Other Thermoelectric Parametersusing Specific Resistivity and Concentration of Charge Carriers of N-Si0.96Ge0.04 Alloy Irradiated by 60Co γ-photons 利用 60Co γ 光子辐照 N-Si0.96Ge0.04 合金的比电阻率和电荷载体浓度确定塞贝克系数和其他热电参数

Physical Science International Journal Pub Date : 2024-02-03 DOI: 10.9734/psij/2024/v28i1817

Rafiel Tkhinvaleli, Lasha Loria, Zurab Adamia, Irakli Nakhutsrishvili

引用次数: 0

Geomagnetic Storm Variation of Vertical Total Electron Content (VTEC) Over Some Euro-African Stations 一些欧非站点上空垂直总电子含量（VTEC）的地磁暴变化

Physical Science International Journal Pub Date : 2024-02-03 DOI: 10.9734/psij/2024/v28i1818

O. J. Ugonabo, E. B. Ugwu, K. Okpala, Godsfavour C. Amanekwe

{"title":"Geomagnetic Storm Variation of Vertical Total Electron Content (VTEC) Over Some Euro-African Stations","authors":"O. J. Ugonabo, E. B. Ugwu, K. Okpala, Godsfavour C. Amanekwe","doi":"10.9734/psij/2024/v28i1818","DOIUrl":"https://doi.org/10.9734/psij/2024/v28i1818","url":null,"abstract":"Geomagnetic storms are events which have physical effects on some ionospheric parameters that, to some extent,affects the state and dynamics of the ionosphere with important implications on GNSS applications. Here, the total electron content (TEC) of Brussels (50.80oN, 04.37oE), Madrid (40.43oN, 04.25oW) and Irkutsk (52.22oN, 104.32oE), which are all mid-latitude European stations are compared with Libreville (00.35oN, 09.67oE) and Lusaka (15.43oS, 28.32oE) which are equatorial and low-latitude stations respectively. This study is done over two geomagnetic storms that took place in the solstice period of 2004. Deviations of storm time VTEC from solar quiet (Sq) averages are calculated, analysed and presented. Similarities and differences of storm effects are observed in the European stations with enhancements and depressions. Diurnal solar quiet day variations showed high VTEC during the post-noon hours for all the stations. The VTEC deviations during storm time at Libreville lie within, for Lusaka it is. For the mid-latitude European stations, the deviations are lower such that is recorded at Brussels while is recorded for both Irkutsk and Madrid. Enhancement of VTEC during the daytime storm period is attributable to the super-fountain effect caused by the prompt penetration electric fields (PPEFs) into the ionosphere and magnetosphere while low VTEC at night-time is attributed to the process of recombination. Understanding the behaviour of the ionosphere during geomagnetic storms is important and necessary for a better understanding of the applications of GNSS.","PeriodicalId":506799,"journal":{"name":"Physical Science International Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139808437","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 Storm Variation of Vertical Total Electron Content (VTEC) Over Some Euro-African Stations 一些欧非站点上空垂直总电子含量（VTEC）的地磁暴变化

Physical Science International Journal Pub Date : 2024-02-03 DOI: 10.9734/psij/2024/v28i1818

O. J. Ugonabo, E. B. Ugwu, K. Okpala, Godsfavour C. Amanekwe

{"title":"Geomagnetic Storm Variation of Vertical Total Electron Content (VTEC) Over Some Euro-African Stations","authors":"O. J. Ugonabo, E. B. Ugwu, K. Okpala, Godsfavour C. Amanekwe","doi":"10.9734/psij/2024/v28i1818","DOIUrl":"https://doi.org/10.9734/psij/2024/v28i1818","url":null,"abstract":"Geomagnetic storms are events which have physical effects on some ionospheric parameters that, to some extent,affects the state and dynamics of the ionosphere with important implications on GNSS applications. Here, the total electron content (TEC) of Brussels (50.80oN, 04.37oE), Madrid (40.43oN, 04.25oW) and Irkutsk (52.22oN, 104.32oE), which are all mid-latitude European stations are compared with Libreville (00.35oN, 09.67oE) and Lusaka (15.43oS, 28.32oE) which are equatorial and low-latitude stations respectively. This study is done over two geomagnetic storms that took place in the solstice period of 2004. Deviations of storm time VTEC from solar quiet (Sq) averages are calculated, analysed and presented. Similarities and differences of storm effects are observed in the European stations with enhancements and depressions. Diurnal solar quiet day variations showed high VTEC during the post-noon hours for all the stations. The VTEC deviations during storm time at Libreville lie within, for Lusaka it is. For the mid-latitude European stations, the deviations are lower such that is recorded at Brussels while is recorded for both Irkutsk and Madrid. Enhancement of VTEC during the daytime storm period is attributable to the super-fountain effect caused by the prompt penetration electric fields (PPEFs) into the ionosphere and magnetosphere while low VTEC at night-time is attributed to the process of recombination. Understanding the behaviour of the ionosphere during geomagnetic storms is important and necessary for a better understanding of the applications of GNSS.","PeriodicalId":506799,"journal":{"name":"Physical Science International Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139867981","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

Determination of the Seebeck Coefficient and Other Thermoelectric Parametersusing Specific Resistivity and Concentration of Charge Carriers of N-Si0.96Ge0.04 Alloy Irradiated by 60Co γ-photons 利用 60Co γ 光子辐照 N-Si0.96Ge0.04 合金的比电阻率和电荷载体浓度确定塞贝克系数和其他热电参数

Physical Science International Journal Pub Date : 2024-02-03 DOI: 10.9734/psij/2024/v28i1817

Rafiel Tkhinvaleli, Lasha Loria, Zurab Adamia, Irakli Nakhutsrishvili

引用次数: 0