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Effects of Swarm neutral mass density assimilation in the ionospheric state estimate during St. Patrick’s Day storm 2015

Fernandez-Gomez, Isabel and Kodikara, Timothy and Borries, Claudia and Forootan, Ehsan and Goss, Andreas and Schmidt, Michael and Codrescu, Mihail (2022) Effects of Swarm neutral mass density assimilation in the ionospheric state estimate during St. Patrick’s Day storm 2015. SPP Dynamic Earth 2022, 31 May - 2 June 2022, Kuehlungsborn, Germany.

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During geomagnetic storms, rapid changes in the upper atmosphere can dramatically affect communication and navigation instruments. Therefore, it is necessary to monitor these events through a good representation of the thermosphere-ionosphere (TI) system. This can be achieved by assimilating data into physical models by means of an ensemble Kalman filter. Due to the coupled nature of the TI system, the ionosphere can be affected by, among others, changes in the neutral atmosphere, especially during storm conditions. In this study, we investigate the ability of the Coupled Thermosphere Ionosphere Plasmasphere electrodynamics physics-based model (CTIPe) to improve the representation of the ionosphere by assimilating Swarm neutral mass density during the 2015 St. Patrick's Day storm. To gauge the ionospheric improvement due to data assimilation we compare the results of the assimilation and non-assimilation runs with along the orbit electron density measurements of GRACE satellite. The results show a reduction in the root mean square error (RMSE) by a 22% with respect to the non-assimilation run. The impact on the global scale is evaluated by comparing CTIPe results with the corresponding output of the 3D B-Spline electron density model. The electron density results show that the equatorial region is the most affected area by the assimilation of neutral density.

Item URL in elib:https://elib.dlr.de/186859/
Document Type:Conference or Workshop Item (Speech)
Title:Effects of Swarm neutral mass density assimilation in the ionospheric state estimate during St. Patrick’s Day storm 2015
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Fernandez-Gomez, IsabelUNSPECIFIEDhttps://orcid.org/0000-0001-7623-9219UNSPECIFIED
Kodikara, TimothyUNSPECIFIEDhttps://orcid.org/0000-0003-4099-9966UNSPECIFIED
Borries, ClaudiaUNSPECIFIEDhttps://orcid.org/0000-0001-9948-3353UNSPECIFIED
Forootan, EhsanAalborg UniversityUNSPECIFIEDUNSPECIFIED
Schmidt, MichaelTechnical University MunichUNSPECIFIEDUNSPECIFIED
Codrescu, MihailSWPC, NOAA, Boulderhttps://orcid.org/0000-0001-7216-9858UNSPECIFIED
Date:2 June 2022
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:Data assimilation, neutral density, electron density, thermosphere-ionosphere system, geomagnetic storm
Event Title:SPP Dynamic Earth 2022
Event Location:Kuehlungsborn, Germany
Event Type:national Conference
Event Dates:31 May - 2 June 2022
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
Location: Neustrelitz
Institutes and Institutions:Institute for Solar-Terrestrial Physics > Solar-Terrestrial Coupling Processes
Deposited By: Fernandez Gomez, PhD. Isabel
Deposited On:28 Jun 2022 11:02
Last Modified:05 Jul 2022 13:04

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