Numerical rise time calculations for obliquely propagating BY pulses |
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| Institution: | 1. Department of Civil and Environmental Engineering, University of New Hampshire, Durham, NH, USA;2. Centre for Infrastructure Engineering, Western Sydney University, Penrith, NSW 2751, Australia;3. School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia;4. Institute of Research and Development, Duy Tan University, Da Nang 550000, Viet Nam;5. Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran;6. Department of Civil and Environmental Engineering, Idaho State University, Idaho, USA;1. Laboratory of Biocomposite Technology, Institute of Tropical Forestry and Forest Products (INTROP), Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia;2. Department of Aerospace Engineering, Faculty of Engineering, Universiti Putra Malaysia, Level 7, Tower Block, Serdang, Selangor, Malaysia;3. Department of Chemical Engineering, College of Engineering, King Saud University, Riyadh, Saudi Arabia;4. Department of Chemical and Environment Engineering, Faculty of Engineering, Universiti Putra Malaysia, Level 7, Tower Block, Serdang, Selangor, Malaysia;1. Department of Computing, Universiti Pendidikan Sultan Idris, Tanjong Malim, Perak 35900, Malaysia;2. Department of Computer Science, Computer Science and Mathematics College, Tikrit University, Tikrit 34001, Iraq;1. Department of Integrative Biotechnology, Sungkyunkwan University, 300 Chuncheon-Dong, Suwon 16419 (Korea);2. School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210008 (China);3. Key laboratory of Ministry of Education for Environment Change and Resources Use in Beibu Gulf, Guangxi Key Laboratory of Earth Surface Processes and Intelligent Simulation, Nanning Normal University, 175 East Mingxiu Road, Nanning 530001 (China);4. School of Natural Sciences, Department of Biological Sciences, Keimyung University, Daegu 42601 (Korea);5. Korea Polar Research Institute, Incheon 21990 (Korea);6. Department of Forestry, Environment and Systems, Kookmin University, Seoul 02707 (Korea);7. State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, 71 East Beijing Road, Nanjing 210008 (China);8. Institut National Recherche Scientifique, Institut Armand-Frappier Santé Biotechnologie, 531 Boulevard des Prairies, Laval H7V1B7 (Canada);9. College of Life Science and Technology, Guangxi University, 100 Daxue Road, Nanning 530004 (China);10. Department of Biological Sciences, Kyonggi University, 154-42 Gwanggyosan-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do 16227 (Korea);11. School of Biological Sciences, Seoul National University, 1 Gwanak-ro, Seoul 08826 (Korea);1. Adjunct Fellow, NCIM Health Research Institute, Western Sydney University, Australia;2. Adjunct Professor, Torrens University, Adelaide, Australia |
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| Abstract: | For planning spread spectrum communication systems over ionospheric HF channels it is important to determine pulse rise times or dispersive bandwidths which are characteristic for wideband propagation. 1(n this paper a numerical technique for the calculation of pulse rise times is proposed. This technique has been developed on the basis of known theoretical results concerning the pulse propagation through a plane stratified ionosphere. The calculations were carried out for several cases of propagation through the lower E-region, using the Jones-Stephenson three-dimensional ray-tracing program. The obtained rise times are in the range from a few μs (for the wave-packet reflected from sporadic-E) to several tens of μs (for the wave-packet propagating nearly along the Pedersen path in the lower E-region). The results are shown to be in good agreement with those previously obtained by other authors, either by measurements or theoretical approaches. |
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