Şiddetli Jeomanyetik Fırtınanın Gece Yarısı İyonosfer Üzerindeki Etkisinin ROTI Aracılığıyla İncelenmesi

Yıl 2018, Cilt: 6 Sayı: 2, 603 - 609, 24.12.2018

Selçuk Sağır , Ramazan Atıcı , İskender Dölek

Öz

Bu
çalışmada, 6 Eylül 2017'deki X-9 ışımaları ile ilişkili koronal kütle
boşalmalarının erken ulaşması ile 07-08 Eylül 2017 tarihlerinde Dünya'nın iyonosferindeki
yoğun jeomanyetik fırtınanın etkisi ROTI, Toplam Elektron İçerik (TEC)
indeksinin oranı (Rate of TEC Index-ROTI) aracılığıyla incelendi. Çalışma beş
farklı enlem bölgesi için IGS-GPS ağına bağlı on istasyondan elde edilen TEC
değerleri ile gerçekleştirilmiştir. Sonuç olarak, fırtına sırasında gece yarısı
güney yarımkürenin yüksek enlem bölgesinde meydana gelen rahatsızlıkların kuzey
yarımkürenin yüksek enlem bölgesinden daha büyük olduğu gözlenmiştir. Ayrıca, tedirgin
günlerdeki ROTI değerlerinin (07-08 Eylül 2017) diğer günlerden daha yüksek
olduğu belirlendi.

Anahtar Kelimeler

İyonosferik TEC, ROTI, jeomanyetik fırtına

Investigation of the Severe Geomagnetic Storm Effects on Ionosphere at Nighttime through ROTI

Öz

In this study, the effect of
the intense geomagnetic storm on the Earth's ionosphere during the period 07-08
September 2017 with the early arrival of coronal mass discharges associated
with X-9 flares on the 6 September 2017 was investigated through ROTI, an index
of Total Electron Content (TEC) ratio (ROT). The study was conducted with TEC
values obtained from ten stations connected to the IGS-GPS network for five
different latitude regions. As a result, it was observed that during the storm,
the disturbances that occurred in the high latitude region of the southern
hemisphere were more disturbed than the high latitude region of the northern
hemisphere at nighttime. In addition, ROTI values were found to be higher than
other days on disturbed days (07-08 September 2017).

Anahtar Kelimeler

Ionospheric TEC, ROTI

Kaynakça

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