Title :
TEC and Scintillation observed over Ho Chi Minh, Vietnam during 2009-2012
Author :
Tam Dao, N.H. ; Vinh Duong, V.
Author_Institution :
Dept. of Atmos. & Space Phys., Vietnam Acad. & Technol., Ho Chi Minh City, Vietnam
Abstract :
The ionospheric total electron content (TEC) and scintillation (S4) over Ho Chi Minh City (HCM) was studied using the Global Positioning System (GPS). We analyzed GPS data during the recent solar cycle 24 from 2009 to 2012. Some results show that both TEC and scintillation in this area presented the seasonal variations peaking on the equinox months. The vertical TEC observed in HCM is high unusually in spring and autumn equinoxes of 2011 but they seem to agree with solar activity index. The scintillation statistics show that their occurrence is almost at night and the S4 index in this region do not exceed the value of 0.8. GPS TEC was using to compare with IRI-2012 model and found the big gap of TEC in 2011. In latest two years, the high solar activity with lots of flares and Coronal Mass Ejections (CMEs) were erupted. Two major geomagnetic storms in August 2011 and March 2012 were examined for seeing the changes of TEC and S4 in South Vietnam.
Keywords :
ionospheric disturbances; magnetic storms; solar coronal mass ejections; AD 2009 to 2012; AD 2011 08; AD 2012 03; GPS data; Global Positioning System; Ho Chi Minh City; IRI-2012 model; South Vietnam; coronal mass ejections; equinox months; geomagnetic storms; ionospheric total electron content; solar activity index; solar cycle 24; Earth; Global Positioning System; Indexes; Receivers; Satellite broadcasting; Satellites; Storms; GPS data; IRI model; S4; ionosphere; scintillation; total electron content;
Conference_Titel :
Space Science and Communication (IconSpace), 2013 IEEE International Conference on
Conference_Location :
Melaka
DOI :
10.1109/IconSpace.2013.6599511
