Propagation of SLF/ELF Electromagnetic Waves by Weiyan Pan, Kai Li (auth.)
By Weiyan Pan, Kai Li (auth.)
This e-book bargains with the SLF/ELF wave propagation, a massive department of electromagnetic conception. The SLF/ELF wave propagation thought is easily utilized in earthquake electromagnetic radiation, submarine verbal exchange, thunderstorm detection, and geophysical prospecting and diagnostics. The propagation of SLF/ELF electromagnetic waves is brought in a number of media just like the earth-ionospheric waveguide, ionospheric plasma, sea water, earth, and the boundary among varied media or the stratified media. functions within the earthquake electromagnetic radiation and the submarine communications also are addressed. This booklet is meant for scientists and engineers within the fields of radio propagation and EM idea and applications.
Prof. Pan is a professor at China examine Institute of Radiowave Propagation in Qingdao (China).
Dr. Li is a professor at Zhejiang college in Hangzhou (China).
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Extra resources for Propagation of SLF/ELF Electromagnetic Waves
Sample text
183), the new incident angle cosine Ci = C0 + C can be obtained by using Newton’s iteration method with the initial value C0 . (5) The first-order approximated parameter Ci for the corresponding ionospheric incident angle cosine can be solved by using Eq. 105) with the parameter Ci . (6) Generally speaking, the ionospheric surface impedance matrix has little change to the incident angle in SLF/ELF ranges, so that the iteration computation repeating the procedures 3 to 5 for two or three times is enough to guarantee the accuracy.
Magnitudes of the excitation factor for the fundamental mode versus the propagation direction are computed and shown in Fig. 15. In the computations in Figs. 5 × 10−4 T. From the above computations, we conclude as follows: • For the attenuation rate and phase velocity of the fundamental mode, there exist directional actions. Obviously, the attenuation rate propagating eastward is smaller than that propagating westward, while the relative phase velocity propagating eastward is also smaller than that propagating westward.
105) with the parameter Ci . (6) Generally speaking, the ionospheric surface impedance matrix has little change to the incident angle in SLF/ELF ranges, so that the iteration computation repeating the procedures 3 to 5 for two or three times is enough to guarantee the accuracy. 02895ω Im S (dB/1000 km). 195) In SLF/ELF ranges, the ground surface impedance is much smaller than the ionospheric surface impedance. Evidently, the change of the ground conductivity has little effect on the phase velocity and attenuation rate of the TM0 wave.