The Variation of Ionospheric TEC During Solar Eclipse on March 20, 2015

Year 2022, Volume: 18 Issue: 4, 403 - 408, 26.12.2022

Ramazan Atıcı Selçuk Sağır

Abstract

Bu çalışma, 20 Mart 2015 tarihindeki güneş tutulması sırasında toplam elektron içeriğinin (TEİ) değişimini araştırmayı amaçlamaktadır. Bu amaçla, beş farklı GPS alıcısından elde edilen TEİ değerleri [(MORP (55.21 N, 1.68 W), ONSA (57.39 N) , 11.92 D), MAR6 (60.59 K, 17.26 D), METS(60.22 K, 24.40 D), TRO1(69.66 K, 18.94 D)] yüzde sapma hesabı kullanılarak güneş tutulması sırasında iyonosferik değişimi belirlemek için incelendi. Güneş tutulmasının etkisini net bir şekilde görebilmek için, referans gün olarak jeomanyetik olarak sakin (30 Mart) ve tedirgin (19 Mart) günlerdeki TEİ değişiklikleri de incelenmiştir. Yüzde sapma hesaplarına bakıldığında tüm istasyonlarda TEC değerlerinde gün batımına benzer bir davranış gözlemlenmekte olup MORP, METS, MAR6, ONSA ve TRO1 istasyonlarında güneş tutulmasına bağlı olarak sırasıyla %16,45 %6,53, %7,99, %8,12 ve %7,22oranında azalma olduğu sonucuna varılmıştır. Her iki referans gününde de TEC değerlerinde bir artış vardır. Ancak tedirgin gündeki artış yüzdesi sakin güne göre daha fazladır. Tutulma büyüklüğü %80'den büyük olan bu beş istasyonda iyonosferik TEİ'deki azalmaların tutulmadan kaynaklandığı ifade edilebilir.

Keywords

GPS-TEC, Ionosphere, Percentage deviation, Solar eclipse

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