Localization of Narrow Bipolar Events over Sumatra Island Based on VHF Interferometer and Magnetic Direction Finder Systems
Narrow bipolar events (NBEs) generate strong radio emissions. In this paper, spatio-temporal analysis of 15 NBEs recorded from a tropical storm over Sumatra Island is presented. Two localization systems, namely the magnetic direction finder (MDF) and interferometer (ITF), were employed and utilized...
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my.uniten.dspace-368282025-03-03T15:44:58Z Localization of Narrow Bipolar Events over Sumatra Island Based on VHF Interferometer and Magnetic Direction Finder Systems Edris M.Z.B. Ahmad M.R. Hashim N.M.Z. Baharin S.A.S. Salim S.I. Ibrahim M.B.M. Baharuddin M.Z. Takayanagi Y. Akita M. Morimoto T. Kawasaki Z. 57189588015 16021287600 48761368300 57206727343 59522903200 58508490100 35329255600 54413056000 35733232800 55359062800 59523426700 Hydrogeology Jurassic Miocene Tropical cyclone Direction-finder Emission height High-frequency interferometers High-frequency magnetics Localisation Narrow bipolar events Radio emission Spatiotemporal analysis Sumatra Very high frequency Interferometers Narrow bipolar events (NBEs) generate strong radio emissions. In this paper, spatio-temporal analysis of 15 NBEs recorded from a tropical storm over Sumatra Island is presented. Two localization systems, namely the magnetic direction finder (MDF) and interferometer (ITF), were employed and utilized to get 2D mapping of the analysed NBEs. A total of four positive NBEs (+NBEs) and 11 negative NBEs (-NBEs) have been identified. The emission heights for +NBEs ranged from 8.38 km to 13.21 km, while for -NBEs, the emission heights were localized and compact ranging between 15.43 km and 15.76 km. The emission distances for all NBEs fell within the range of 233.33 km to 243.87 km. The maximum cloud top height was estimated at 18.61 km. The upward movement of very high frequency (VHF) radiation sources has been observed for all four positive NBEs indicating fast negative breakdowns (FNBs). ? 2024 IEEE, ? VDE VERLAG GMBH � Berlin � Offenbach. Final 2025-03-03T07:44:58Z 2025-03-03T07:44:58Z 2024 Conference paper 2-s2.0-85215669590 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85215669590&partnerID=40&md5=a70e7c96e73ba8a40241132f3b9986d3 https://irepository.uniten.edu.my/handle/123456789/36828 877 882 VDE Verlag GmbH Scopus |
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Hydrogeology Jurassic Miocene Tropical cyclone Direction-finder Emission height High-frequency interferometers High-frequency magnetics Localisation Narrow bipolar events Radio emission Spatiotemporal analysis Sumatra Very high frequency Interferometers |
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Hydrogeology Jurassic Miocene Tropical cyclone Direction-finder Emission height High-frequency interferometers High-frequency magnetics Localisation Narrow bipolar events Radio emission Spatiotemporal analysis Sumatra Very high frequency Interferometers Edris M.Z.B. Ahmad M.R. Hashim N.M.Z. Baharin S.A.S. Salim S.I. Ibrahim M.B.M. Baharuddin M.Z. Takayanagi Y. Akita M. Morimoto T. Kawasaki Z. Localization of Narrow Bipolar Events over Sumatra Island Based on VHF Interferometer and Magnetic Direction Finder Systems |
| description |
Narrow bipolar events (NBEs) generate strong radio emissions. In this paper, spatio-temporal analysis of 15 NBEs recorded from a tropical storm over Sumatra Island is presented. Two localization systems, namely the magnetic direction finder (MDF) and interferometer (ITF), were employed and utilized to get 2D mapping of the analysed NBEs. A total of four positive NBEs (+NBEs) and 11 negative NBEs (-NBEs) have been identified. The emission heights for +NBEs ranged from 8.38 km to 13.21 km, while for -NBEs, the emission heights were localized and compact ranging between 15.43 km and 15.76 km. The emission distances for all NBEs fell within the range of 233.33 km to 243.87 km. The maximum cloud top height was estimated at 18.61 km. The upward movement of very high frequency (VHF) radiation sources has been observed for all four positive NBEs indicating fast negative breakdowns (FNBs). ? 2024 IEEE, ? VDE VERLAG GMBH � Berlin � Offenbach. |
| author2 |
57189588015 |
| author_facet |
57189588015 Edris M.Z.B. Ahmad M.R. Hashim N.M.Z. Baharin S.A.S. Salim S.I. Ibrahim M.B.M. Baharuddin M.Z. Takayanagi Y. Akita M. Morimoto T. Kawasaki Z. |
| format |
Conference paper |
| author |
Edris M.Z.B. Ahmad M.R. Hashim N.M.Z. Baharin S.A.S. Salim S.I. Ibrahim M.B.M. Baharuddin M.Z. Takayanagi Y. Akita M. Morimoto T. Kawasaki Z. |
| author_sort |
Edris M.Z.B. |
| title |
Localization of Narrow Bipolar Events over Sumatra Island Based on VHF Interferometer and Magnetic Direction Finder Systems |
| title_short |
Localization of Narrow Bipolar Events over Sumatra Island Based on VHF Interferometer and Magnetic Direction Finder Systems |
| title_full |
Localization of Narrow Bipolar Events over Sumatra Island Based on VHF Interferometer and Magnetic Direction Finder Systems |
| title_fullStr |
Localization of Narrow Bipolar Events over Sumatra Island Based on VHF Interferometer and Magnetic Direction Finder Systems |
| title_full_unstemmed |
Localization of Narrow Bipolar Events over Sumatra Island Based on VHF Interferometer and Magnetic Direction Finder Systems |
| title_sort |
localization of narrow bipolar events over sumatra island based on vhf interferometer and magnetic direction finder systems |
| publisher |
VDE Verlag GmbH |
| publishDate |
2025 |
| _version_ |
1825816285767794688 |
| score |
13.244413 |