| 000 | 05645nam a2200421 4500 | ||
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| 003 | EG-NbEJU | ||
| 005 | 20250121150701.0 | ||
| 008 | 250120b2024 ua | m||| 00| 0 eng d | ||
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_aEG-NbEJU _beng _cEG-NbEJU _dEG-NbEJU |
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| 041 |
_aeng _bara |
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| 050 |
_aAIS Phd. 2024 _b01 C.1 |
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| 100 | 1 | _aNasurudiin , Sebwato , | |
| 245 | 1 | 0 |
_aClimatological Study of Geomagnetic Pulsations During Different Levels of Solar Activity : _bA Thesis Submitted to the Graduate School of Basic and Applied Sciences : Egypt-Japan University of Science and Technology (E-JUST) : In Partial Fulfillment of the Requirements for the Degree of Master of Science in Space Environment / _cby Sebwato Nasurudiin ; Supervision Committee Prof. Ayman Mahrous - Department of Space Environment - Egypt-Japan University of Science and Technology - Egypt , Prof. Ahmed Elsaid - Department of Applied and Computational Mathematics - Egypt-Japan University of Science and Technology - Egypt , Prof. Akimasa Yoshikawa - Kyushu University - Japan ; Examination Committee Prof. Ayman Mahrous - Department of Space Environment - Egypt-Japan University of Science and Technology - Egypt , Prof. Magdy Youssef Amin - Astronomy Department - Faculty of Science - Cairo University - Egypt , Prof. Dalia Elfiky - Space Environment Department - National Authority of Remote sensing and space science (NARSS) |
| 246 | 1 | 5 |
_aدراسة مناخية للنبضات الجيومغناطيسية خلال مستويات مختلفة من النشاط الشمسي : _bرسالة علمية مقدمة إلى المدرسة التخصصية للدراسات العليا - معهد العلوم الأساسية و التطبيقية : الجامعة المصرية اليابانية للعلوم والتكنولوجيا كاستيفاء جزئي امتطلبات الحصول على درجة (ماجستير العلوم) في البيئة الفضائية / إعداد سيبوانوا نصر الدين ; لجنة الإشراف على الرسالة أ . د أيمن محروس , أ . د أحمد السعيد , البروفيسور اكيماسا يوشيكاوا ; لجنة المناقشة و الحكم على الرسالة , أ . د أيمن محروس , أ . د مجدي يوسف أمين , أ . د داليا الفقي |
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_aAlexandria : _bSebwato Nasurudiin _c2024 |
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| 300 |
_a71 leaves ; _c30 cm |
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| 500 | _aIncludes a title page in Arabic | ||
| 502 |
_aThesis (M.Sc.) _bMaster _cEgypt - Japan University of Science and Technology (E-JUST) - School of Basic and Applied Sciences - Space Environment Department _d2024 |
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| 504 | _aIncludes bibliographical references | ||
| 520 | _aThis study employed wavelet-based analysis to compare Pc5 waves observed in space and on the ground It aimed to validate the coherence of Pe5 wave events across different environments and to investigate the possibility of their generation from shared sources Additionally, the study sought to correlate Pe5 waves with ionospheric scintillation events and to develop machine learning models for predicting these scintillations using relevant data The study utilized Pes wave data from the Geostationary Operational Environmental Satellite (GOES - 10) satellite and two auroral ground-based magnetometers from the Svalbard network, covering the solar cycle 23 (2000-2009) The magnetic field data from GOES-10 were converted into a mean field-aligned coordinate system using the empirical mode decomposition (EMD) method, focusing on the Bz component for terrestrial data and the toroidal component for satellite data Stein's Unbiased Risk Estimate (SURE) method with soft thresholding was employed to denoise the extracted Pe5 events. Wavelet-based analysis was used to study the signal characteristics in both the time and frequency domains, ensuring the identification and validation of Pes ultra-low frequency (ULF) wave events The study found a good coherence between Pes events observed in space and on the ground, indicating a common generation source However, Pes waves observed in space had smaller amplitudes (21 nT) compared to those detected on the ground (350 nT), likely due to factors such as absorption, reflection, ionospheric ducting, and spatial fluctuations The wavelet-based analysis effectively identified Pe5 ULF wave events and validated signals recorded at different stations Pe5 events extracted from the auroral ground magnetometer stations showed a high correlation with the Kp index, validating the integrity of the extracted Pe5 events Finally, we observed that the percentage of events retrieved from the ground was 86 % and that in space was 94 %. The difference between both events during the years was due to the spatial distribution of Pe5 events | ||
| 530 | _aIssued also as a digital file (for more information please check our Digital Repository) | ||
| 590 |
_aAnD _bACM |
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| 700 | 1 |
_aMahrous , Ayman , _eSupervisor |
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| 700 | 1 |
_aElsaid , Ahmed , _eco-Supervisor |
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| 700 | 1 |
_aYoshikawa , Akimasa , _eco-Supervisor |
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| 700 | 1 |
_aMahrous , Ayman , _eExaminator |
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| 700 | 1 |
_aAmin , Magdy Youssef , _eco-Examinator |
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| 700 | 1 |
_aElfiky , Dalia , _eco-Examinator |
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| 700 | 1 |
_aمحروس , أيمن , _eمشرف |
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| 700 | 1 |
_aالسعيد , أحمد , _eمشرف مساعد |
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| 700 | 1 |
_aيوشيكاوا , اكيماسا , _eمشرف مساعد |
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| 700 | 1 |
_aمحروس , أيمن , _eمناقش |
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| 700 | 1 |
_aأمين , مجدي يوسف , _eمناقش مساعد |
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| 700 | 1 |
_aالفقي , داليا , _eمناقش مساعد |
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| 901 | _aHaGeR | ||
| 902 | _aTH_15012025_ (7) | ||
| 942 |
_2lcc _n0 _cDISS |
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| 999 |
_c7144 _d7144 |
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