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Global-Scale Ionospheric Tomography During the 17 March 2015 Geomagnetic Storm

Prol, Fabricio and Kodikara, Timothy and Hoque, Mohammed Mainul and Borries, Claudia (2021) Global-Scale Ionospheric Tomography During the 17 March 2015 Geomagnetic Storm. Space Weather. Wiley. doi: 10.1029/2021SW002889. ISSN 1542-7390.

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Official URL: https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2021SW002889


The correct representation of global-scale electron density is crucial for monitoring and exploring the space weather. This study investigates whether the ground-based Global Navigation Satellite System (GNSS) tomography can be used to reflect the global spatial and temporal responses of the ionosphere under storm conditions. A global tomography of the ionosphere electron density is constructed based on data from over 2700 GNSS stations. In comparison to previous techniques, advances are made in spatial and temporal resolution, and in the assessment of results. To demonstrate the capabilities of the approach, the developed method is applied to the 17 March 2015 geomagnetic storm. The tomographic reconstructions show good agreement with electron density observations from worldwide ionosondes, Millstone Hill incoherent scatter radar and in-situ measurements from satellite missions. Also, the results show that the tomographic technique is capable of reproducing plasma variabilities during geomagnetically disturbed periods including features such as equatorial ionization anomaly enhancements and depletion. Validation results of this brief study period show that the accuracy of our tomography is better than the Neustrelitz Electron Density Model, which is the model used as background, and physics-based thermosphere-ionosphere-electrodynamics general circulation model. The results show that our tomography approach allows us to specify the global electron density from ground to approximately 900 km accurately. Given the demonstrated quality, this global electron density reconstruction has potential for improving applications such as assessment of the effects of the electron density on radio signals, GNSS positioning, computation of ray tracing for radio-signal transmission, and space weather monitoring.

Item URL in elib:https://elib.dlr.de/145580/
Document Type:Article
Additional Information:This work was funded by the Deutsche Forschungsgemeinschaft (DFG) under the grant no. HO 6136/1-1 and by the ‘Helmholtz Pilot Projects Information & Data Science II’ (grant support from the Initiative and Networking Fund of the Hermann von Helmholtz-Association Deutscher Forschungszentren e.V. (ZT-I-0022)) with the project named ‘MAchine learning based Plasma density model’ (MAP).
Title:Global-Scale Ionospheric Tomography During the 17 March 2015 Geomagnetic Storm
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Prol, FabricioUNSPECIFIEDhttps://orcid.org/0000-0002-7206-1705UNSPECIFIED
Kodikara, TimothyUNSPECIFIEDhttps://orcid.org/0000-0003-4099-9966UNSPECIFIED
Hoque, Mohammed MainulUNSPECIFIEDhttps://orcid.org/0000-0001-5134-4901UNSPECIFIED
Borries, ClaudiaUNSPECIFIEDhttps://orcid.org/0000-0001-9948-3353UNSPECIFIED
Date:9 November 2021
Journal or Publication Title:Space Weather
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Keywords:ionosphere, GNSS tomography, Neustrelitz Electron Density Model, tie-gcm, St Patrick's day storm
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Solar-Terrestrial Physics SO, R - Project Space weather research, R - Ionosphere
Location: Neustrelitz
Institutes and Institutions:Institute for Solar-Terrestrial Physics
Deposited By: Kodikara, Dr Timothy
Deposited On:15 Nov 2021 11:56
Last Modified:18 Oct 2023 08:17

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