Title :
Spatio-temporal characteristics of sub-ionospheric perturbations associated with annular solar eclipse over Japan: Network observations and modeling
Author :
Inui, Daiki ; Hobara, Yasuhide
Author_Institution :
Dept. of Commun. Eng. & Inf., Univ. of Electro-Commun., Chofu, Japan
Abstract :
The UEC´s VLF/LF transmitter observation network has been operating years in order to monitor the ionospheric perturbations caused by various physical phenomena. A solar eclipse is one of the factors that produce disturbances in the lower ionosphere. In this paper, we analyze VLF amplitude data from our network associated with annular solar eclipse in 2012. Clear temporal dependences of the VLF/LF amplitude were identified at various VLF/LF receivers. Numerical computations of VLF/LF signals with the ionospheric perturbations due to the solar eclipse were carried out by using 2D-FDTD method. As a result, temporal variations of the VLF/LF amplitude are in rather good agreement with those from the numerical modeling.
Keywords :
finite difference time-domain analysis; ionospheric disturbances; ionospheric techniques; solar eclipses; solar-terrestrial relationships; 2D FDTD method; AD 2012; Japan; UEC LF transmitter observation network; UEC VLF transmitter observation network; VLF amplitude data; VLF receivers; annular solar eclipse; ionospheric perturbation monitoring; lower ionospheric disturbances; network observations; spatiotemporal characteristics; subionospheric perturbation; Ionosphere; Monitoring; Moon; Numerical models; Radio transmitters; Receivers;
Conference_Titel :
General Assembly and Scientific Symposium (URSI GASS), 2014 XXXIth URSI
Conference_Location :
Beijing
DOI :
10.1109/URSIGASS.2014.6929555
