Mehmet YAŞAR

Üst İyonküredeki ‘$O^+ + N_2$’ Reaktif Çarpışmasına Ait Kayıp Terimlerinin Değişimlerinde Güneş Tutulması Etkisinin İncelenmesi

Dünya iyonküresi üzerindeki güneş tutulma etkilerinin incelenmesi tutulma süresince iyonküre yapısındaki ani ve orta ölçekli değişmeler ile ilgili oldukça önemli bilgi kaynağı sağlar. Bu çalışmada Kharkov şehrinde (49.60K, 36.30D) 29 Mart 2006 tarihinde gözlemlenen güneş tutulmasının ‘$O^+ + N_2 → NO^+ + N$’ reaktif reaksiyona ait kayıp terimleri üzerindeki etkisi yüksekliğe (252, 303, 353 ve 399 km) ve zamana (evrensel zaman dilimine göre saat 09.00’dan 12.30’a kadar) bağlı olarak incelenmiştir. İncelemeler sonucunda kayıp terimlerinin her üç gün içinde (28, 29, 30 Mart) yükseklikle ters orantılı bir şekilde değiştiği görülmüştür. 29 Mart gününde tam tutulmanın meydana geldiği zaman aralığında kayıp teriminin azaldığı görülmüştür. İyonküre üzerindeki güneş tutulma etkisinin tutulmadan sonraki günde önceki güne nazaran daha fazla olduğu tespit edilmiştir.

Investigation of the Solar Eclipse Effect on the Changes of the Loss Terms for ‘$O^+ + N_2$’ Reactive Collision in the Upper Ionosphere

The examining the effect of solar eclipses on the earth ionosphere provides a very important source of information about sudden and medium-scale changes in the ionosphere structure during a solar eclipse. In this study, the effect of solar eclipse observed on March 29, 2006 in Kharkov city (49.6° N, 36.3° E) on loss terms of $O^+ + N_2 → NO^+ + N$reactive reaction was investigated depending on the altitude (252, 303, 353 and 399 km) and time (UT from 09.00 to 12.30). As a result of the investigations, it was seen that the loss terms change inversely with the height within every three days (28, 29, 30 March). It was observed that the loss term decreased during the time period when the total eclipse occurred on the March 29. It has been found that the solar eclipse effect on the ionosphere is greater on the day after the eclipse than the day before.

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