Radio Occultation Studies of Disturbances in the Earth’s Ionosphere During a Magnetic Storm on June 22–23, 2015

The results of ~100 sessions of sounding of the Earth’s high-latitude (>65° N) ionosphere performed on June 22–23, 2015, at a GPS carrier frequency of f 1 = 1575.42 MHz ( L 1 range, wavelength of ~19.0 cm) in the FORMOSAT-3/COSMIC radio occultation experiment are analyzed. The coronal plasma ejec...

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Bibliographic Details
Published in:Geomagnetism and Aeronomy 2021-11, Vol.61 (6), p.810-818
Main Authors: Gubenko, V. N., Andreev, V. E., Kirillovich, I. A., Gubenko, T. V., Pavelyev, A. A., Gubenko, D. V.
Format: Article
Language:English
Subjects:
Absorption
Carrier frequencies
Data analysis
E region
Earth
Earth and Environmental Science
Earth magnetosphere
Earth Sciences
Geophysics/Geodesy
Global positioning systems
GPS
Ionosphere
Ionospheric disturbances
Ionospheric sounding
Latitude
Magnetic storms
Radio occultation
Radio waves
Satellite navigation systems
Satellites
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Summary:The results of ~100 sessions of sounding of the Earth’s high-latitude (>65° N) ionosphere performed on June 22–23, 2015, at a GPS carrier frequency of f 1 = 1575.42 MHz ( L 1 range, wavelength of ~19.0 cm) in the FORMOSAT-3/COSMIC radio occultation experiment are analyzed. The coronal plasma ejections that reached the Earth’s magnetosphere during this time period provoked a strong magnetic storm of the G 4 class ( G 4 = Kp – 4), which caused significant fluctuations in radio wave parameters on ionospheric sounding paths: navigation (GPS) satellites—low-orbit (FORMOSAT-3/COSMIC) satellites. Ionospheric disturbances in the characteristics of radio waves are shown to be caused by both geomagnetic conditions and the activity of powerful X-ray flares during measurements. A search for the absorption of decimeter radio waves (wavelength of ~19 cm) at a GPS carrier frequency of f 1 = 1545.42 MHz was carried out. Based on the results of the FORMOSAT-3/COSMIC data analysis, an integral absorption of ~3 dB of decimeter radio waves was detected for the first time on the sounding paths in the D and E regions of the Earth’s high-latitude ionosphere.
ISSN:0016-7932
1555-645X
0016-7940
DOI:10.1134/S0016793221060050