Title :
FDTD modeling of diurnal/seasonal variations of Schumann resonance
Author :
Xiao Yuan ; Yi Wang ; Jinzhi He ; Qunsheng Cao
Author_Institution :
Coll. of Electron. & Inf. Eng., Nanjing Univ. of Aeronaut. & Astronaut., Nanjing, China
Abstract :
A three-dimensional geodesic finite difference time domain (G-FDTD) algorithm is employed to model the diurnal/seasonal variations of the first five Schumann resonance parameters (SRs), including resonance frequencies and quality factors, in the Earth-ionosphere (E-I) system. In order to make the results more accurate, Prony´s method is introduces to obtain these parameters. Through several simulations the SRs shift with time/locations are found and compared with reference results. Besides, different conductivity profiles of the ionosphere including the two-exponential profile and the “knee” profile are also considered in the simulations to assure the results.
Keywords :
differential geometry; finite difference time-domain analysis; ionosphere; radiowave propagation; Earth-ionosphere system; FDTD modeling; G-FDTD algorithm; Prony´s method; Schumann resonance parameters; diurnal variations; knee conductivity profile; quality factors; resonance frequencies; seasonal variations; three-dimensional geodesic finite difference time domain algorithm; two-exponential profile; Conductivity; Finite difference methods; Geophysical measurement techniques; Ground penetrating radar; Ionosphere; Resonant frequency; Time-domain analysis; Conductivity; FDTD; Schumann Resonance; the Earth-ionosphere System;
Conference_Titel :
Microwave Conference Proceedings (APMC), 2013 Asia-Pacific
Conference_Location :
Seoul
DOI :
10.1109/APMC.2013.6695123
