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

fYear

2014

fDate

16-23 Aug. 2014

Firstpage

1

Lastpage

3

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;

fLanguage

English

Publisher

ieee

Conference_Titel

General Assembly and Scientific Symposium (URSI GASS), 2014 XXXIth URSI

Conference_Location

Beijing

Type

conf

DOI

10.1109/URSIGASS.2014.6929555

Filename

6929555