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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Ya'acob, N. Ismail, M. Yusof, A.L. Ali, M.T. Osman, M. |
| Copyright Year | 2012 |
| Description | Author affiliation: Faculty of Electrical Engineering, Universiti Teknologi MARA (UiTM), 40450 Shah Alam, Selangor, Malaysia (Ya'acob, N.; Yusof, A.L.; Ali, M.T.; Osman, M.) || Department of Electrical, Electronic and Systems Engineering,Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia (Ismail, M.) |
| Abstract | This paper presents an observation of tweek radio atmospherics received at Malaysia (UKM station) from $21^{st}$ to $25^{th}$ October 2010 and $1^{st}$ to $5^{th}$ November 2010 from 12:00:00 UT to 00:00:00 UT (Universal Time); 08:00 pm to 08:00 am. Fundamental cut-off frequency (fcm) will be extracted from tweeks spectrograms to measure the night-time D-region ionospheric reflection height (h), night-time D-region equivalent electron density (ne) and propagation distance (d) traveled by VLF waves from the causative lightning discharges to the receiving station. Analysis of 10 days sample that involves 2518 tweeks demonstrates that these ELF/VLF signals travel considerable distances up to 7500 km from the causative lightning discharges. The estimated ionosphere reflection height varies from 85 km to 92 km and the estimated equivalent electron density at the reflection height varies from 22 $el/cm^{3}$ to 24 $el/cm^{3}.$ |
| Starting Page | 462 |
| Ending Page | 466 |
| File Size | 1557229 |
| Page Count | 5 |
| File Format | |
| ISBN | 9781467347266 |
| e-ISBN | 9781467347280 |
| e-ISBN | 9781467347273 |
| DOI | 10.1109/APCC.2012.6388181 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2012-10-15 |
| Publisher Place | Korea (South) |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Ground penetrating radar Geophysical measurement techniques Ionosphere Cutoff frequency Reflection Harmonic analysis Atmospheric waves D-Region Ionosphere Tweek radio atmospherics Very Low Frequency (VLF) Lightning Discharge |
| Content Type | Text |
| Resource Type | Article |
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