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ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa
CURRENT PROBLEMS IN REMOTE SENSING OF THE EARTH FROM SPACE

  

Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2021, Vol. 18, No. 1, pp. 229-240

On the possibility of detecting local features of the main ionospheric trough zone using data from navigation satellite systems

V.M. Smirnov 1 , E.V. Smirnova 1 
1 V.A. Kotelnikov Institute of Radioengineering and Electronics RAS, Fryazino Branch, Fryazino, Moscow Region, Russia
Accepted: 26.01.2021
DOI: 10.21046/2070-7401-2021-18-1-229-240
This work is devoted to demonstrating the possibility of using the radio translucence method of the Earth’s ionosphere with signals from navigation satellite systems to study the peculiarities of the state of the subauroral ionosphere in the main ionospheric trough, which manifested themselves in the abnormal position of the plasmapause and a decrease in the electron concentration. The anomaly detected during the processing of experimental data obtained in the process of continuous monitoring of the ionosphere state, carried out with the help of a hardware-software complex operating based on data from the mean-orbit navigation satellite systems GPS and GLONASS. The resulting effect in the form of a sharp decrease in the electron concentration in the F2-layer of the ionosphere observed at latitudes 57–59° and in two longitudinal sectors, approximately 25–35° and 40–50° eastern longitude. Detected area of the local decrease in electron concentration observed according to the data of all satellites, the trajectories of the subionospheric points for which were located at latitudes 57–59° in the morning, evening and night hours. The local dip width in the morning time of the day was about 0.9°, the width of the main local dip in the evening was about 0.5°. At the same time, a decrease in the electron concentration observed more than 6 times in the morning, and 4 times in the evening. The width of the main ionospheric trough was in this case about 8°.
Keywords: ionosphere, electron concentration, navigation satellite systems, auroral zone, main ionospheric trough, hardware-software complex, radio translucence
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