IONOSPHERIC RESPON DURING TOTAL SOLAR ECLIPSE 9 MARCH 2016 OVER INDONESIA

• Main Author: MEUTIA - NIM: 20216030, WINDA
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/31641
• Institution: Institut Teknologi Bandung

<p align="justify">The total solar eclipse on 9 March 2016 is a rare phenomenon that can be observed in 12 provinces in Indonesia. The decrease in solar radiation to the earth during total solar eclipse will affect the total amount of Total Electron Content (TEC) in the ionosphere. The dynamics of ionosphere during total solar eclipse occurrence above Indonesia have been studied using data from 40 Globlal Positioning System (GPS) stations spread all over Indonesia. Based on the result of the research, it is found that the decrease of TEC over Indonesia during the eclipse is not only on the path of the eclipses totality but also almost throughout the longitude and latitude observed by PRN. Although there is a decrease in TEC during eclipses but it does not arouse the scintillation. This research also analyzed the relationship betweenmagnitude of the eclipse to the decrease of TEC at 3 GPS samples stations. Analysis of each station shows that the largest decrease of TEC is at CSMN station (69,5125% for PRN 24 and 70,6781% for PRN 12), followed by CREO station (23,78% for PRN 24 and 45,73% for PRN 12), and CNDE (22.87% for PRN 12 and 29% for PRN 24). Time required by TEC to achieve maximum decline from the initial contact of eclipse is faster than recovery time. The maximum TEC decrease occurs a few minutes after the maximum peak time of the eclipse. It is indicating that the recombination process is still ongoing even though the peak of the eclipse has occurred. The amount of TEC decrease is proportional to the magnitude of the eclipse in which directly related to the photoionization process. Because Indonesia is located in a low latitude area of the magnetic equator, the dynamics of the ionosphere on it becomes more complex due to the fountain effect. At the time of the eclipse, the fountain effect will weaken and disrupt the plasma transport from the magnetic equator to the lower latitudes.<p align="justify">