"SCIENCE AND EDUCATION IN THE MODERN WORLD:
CHALLENGES OF THE XXI CENTURY"
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Figure 1. The last year solar flare on 6th September at 11.53-12.10 UT. It was able to shine
huge amount of x-rays (X 9.3) and a delayed proton wind capable to disturb or even disrupt
several GPS satellite and to lead also to huge geomagnetic storms and boreal lights.
Figure 2. The 6
th
September 2017 flare was able to shine huge amount of x-rays.
"SCIENCE AND EDUCATION IN THE MODERN WORLD:
CHALLENGES OF THE XXI CENTURY"
NUR-SULTAN, KAZAKHSTAN, JULY 2019
375
Figure 3. DTEC and VTEC increase peak the during Solar flare for Tashkent GPS
station.
Figure 4. GOES time history of proton fluxes of 2017 September 4–7.
To identify the anomalous values of Total Electron Content TEC we calculated differential
TEC (dTEC). dTEC is obtained by subtracting monthly averaged diurnal vTEC from the values
of observed vTEC at each epoch. Fig.3 shows that differential TEC and Vertical TEC
increasing peak the during solar flare of September 2017. In Figure 4, where the proton time
profiles are shown, the SEPs under consideration are marked by vertical arrows. These SEPs
were caused by the following flares: M5.5 flare on September 4, soft X-ray peak time 20:33
UT, coordinates S06W12; X9.3 flare on September 6, 12:02, S09W38; X8.2 flare on September
10, 16:06, S09W85.
References
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VLF receiver at Tashkent IHY station, Adv. Space Research, 2014, Vol.54,pp.628-643.
2. Ахмедов Б.Ж., Тожиев С.Р., Эшкуватов Х.Э, Total Electron Content (TEC) Extraction using
Kitab and Tashkent GPS stations.//Uzbek Journal of Physics, №6,.pp361-366.2016.
3.
Ахмедов Б.Ж., Тожиев С.Р., Эшкуватов Х.Э. Низкочастотные радиоизлучения в
D-слое ионосферы и возможности их регистрации на Ташкентской ОНЧ станции //
Uzbek Journal of Physics, Vol.17,№6, pp.339-350, 2015 .
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