Title :
TEC variations in the Southeast Asian equatorial anomaly region during the magnetic storms using signal from GPS satellite
Author :
Tan, Le Minh ; Van Hue, Hoang ; Hai, Phung Viet ; Tam, Dao Ngoc Hanh
Author_Institution :
Fac. of Natural Sci. & Technol., Tay Nguyen Univ., Buon Ma Thuot, Vietnam
Abstract :
Total Electron Content (TEC) of the ionosphere over the Southeast Asian region has been derived from measurements obtained at GPS ground stations of the International GPS Service (IGS) and three GPS ground stations of Vietnam in 2010. This paper presents the results of the study of the TEC variations during four magnetic storms on 4-10 April, 1-9 May, 1-8 August and 10-15 October, 2010. It was found that the structure of the daytime equatorial ionization anomaly (EIA), which consists of two peaks in the vicinity of 10°-15° magnetic latitude. Results are also shown that both peaks are fully developed at around afternoon. The TEC values of peaks on 4-10 April and 10-15 October are higher than on 1-9 May and 1-8 August. During the early stage of the magnetic storms, the EIA expanded poleward with large increases of TEC, which provides evidence of a penetration of the eastward electric field and a strong plasma fountain effect associated with the upward plasma drifts. In the recovery phase, the EIA is significantly reduced; the TEC value decreases and the peaks move equatorward.
Keywords :
Global Positioning System; atmospheric electricity; atmospheric structure; ionospheric disturbances; magnetic storms; plasma drift waves; AD 2010 04 04 to 10; AD 2010 05 01 to 09; AD 2010 08 01 to 08; AD 2010 10 10 to 15; GPS ground station; GPS satellite signal; International GPS Service; Southeast Asian equatorial anomaly region; TEC variation; Vietnam; eastward electric field; equatorial ionization anomaly; ionosphere; magnetic storm; plasma fountain effect; total electron content; upward plasma drift; Global Positioning System; Indexes; Ionosphere; Plasmas; Receivers; Satellites; Storms; EIA and GPS; Ionosphere; Magnetic storm; TEC;
Conference_Titel :
Space Science and Communication (IconSpace), 2011 IEEE International Conference on
Conference_Location :
Penang
Print_ISBN :
978-1-4577-0563-2
Electronic_ISBN :
978-1-4577-0562-5
DOI :
10.1109/IConSpace.2011.6015847