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Investigation of the effects of geomagnetic storms on ionospheric irregularities using the combination of ground-based GNSS and SWARM satellites data
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Alireza Atabati   , Iraj Jazireeyan * , M. Mahdi Alizadeh , Amirhossein Pourmina , Ahad Malekzadeh |
| K. N. Toosi University of Technology |
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Abstract: (2652 Views) |
| Geomagnetic storms are one of the main causes of ionospheric perturbations in different sizes, which depending on their intensity, they can disturb the radio signals passing through this medium. On September 6-12, 2017, the sudden storm commencement (SSC) was the most massive geomagnetic storm of the year due to the X9 solar flare caused by a coronal mass ejection (CME). IMF-Bz and Dst values increased when the first SSC occurred at 23:43 on September 6. The second SSC has a more vigorous intensity at 23:00 on September 7 that caused a dramatic increas the other geophysical parameters such as Kp and AE. During the second SSC, Kp index reached 8, and AE reached 2500 nT. In this research, the ionospheric irregularities over OLO3 station (-2.75E,35.87N,1483.00H) located at Arusha in Tanzania were analyzed using ground-based GNSS data and in situ measurements SWARM satellites. This procedure was applied to VTEC, signal to noise ratio (S4), and Rate of TEC Index (ROTI) values obtained from ground-based GNSS (GB-GNSS) and SWARM A & C in order to identify ionospheric perturbations during the geomagnetic storm. Furthermore, Langmuir plasma probes of SWARM satellites were implemented to recognize the rate of electron density (RODI). The results show that GB-GNSS and Swarm satellite geophysical ionospheric parameters increased during September 6-12, that indicate the effect of the geomagnetic storm on the increase of ionospheric perturbations. This work shows the potential of using space‐based in situ measurement to detect ionospheric irregularities caused by the geomagnetic storm for areas such as oceans and deserts, where ionospheric observations are hardly possible. |
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| Keywords: Ionospheric Irregularity, Geomagnetic Storm, Total Electron Content (TEC), Rate of Tec (ROTI), Ionospheric Scintillation, SWARM |
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Full-Text [PDF 2452 kb]
(834 Downloads)
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Type of Study: Research |
Subject:
Geodesy
Received: 2020/09/19 | Accepted: 2021/02/23 | Published: 2023/02/6
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