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Regional characterization of ionospheric perturbations degree with GIX and SIDX

Cahuasqui Llerena, Juan Andres und Hoque, Mohammed Mainul und Jakowski, Norbert und Nykiel, Grzegorz (2022) Regional characterization of ionospheric perturbations degree with GIX and SIDX. In: 44th COSPAR Scientific Assembly. 44th COSPAR Scientific Assembly, 2022-07-16 - 2022-07-24, Athens, Greece.

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Offizielle URL: https://ui.adsabs.harvard.edu/abs/2022cosp...44.3478A/abstract

Kurzfassung

Ionospheric perturbations deteriorate the accuracy, integrity, availability and continuity of precise and safety-of-life Global Navigation Satellite Systems (GNSS) applications. Therefore, a reliable characterization of the spatial gradients and rapid changes in the total electron content (TEC) is crucial in order to mitigate their impact. With this aim, we present here the results achieved by using dual-frequency GNSS measurements for estimating the Gradient Ionospheric indeX (GIX) and the Sudden Ionospheric Disturbance indeX (SIDX) over Europe and South America. The advantage of these two index approaches is their capability to estimate the spatial and temporal perturbation degree of the ionosphere instantaneously without statistical analyses of historical data. Our dataset covers two periods of 2015 with contrasting geomagnetic activity selected in the framework of the Coordinated Ionospheric Study of Scales and Indices (CISSI) initiation within the COSPAR-related International Space Weather Action Team (ISWAT) G2B-04. The first period covers the St. Patrick Day storm (DoY 75-78) and the second period covers a period of geomagnetically quiet conditions (DoY 142-145). Our estimate of GIX for the quiet days shows a regular pattern of diurnal variation with values of less than 10 milliTECU/km. On the contrary, the gradient values during the perturbed period are enhanced by several times, reaching values of more than 30 milliTECU/km over stormy conditions. By computing GIX at different horizontal scales, we find that the higher values of gradients are obtained for the shorter ranges (e.g. 30-250 km) rather than for larger scales (e.g. 50-500 km). This agrees with essentially stronger smoothing over longer distances. Also, by considering ionospheric piercing points (IPPs) at three different latitude ranges over Europe, our estimates of GIX show different behavior that depend on the propagation mechanism of ionospheric storms. This is also valid for SIDX which is sensitive to rapid temporal changes of the ionospheric ionization, e.g. initiated by solar flares or particle precipitation events. We further discuss the potential of the ionospheric indices GIX and SIDX for GNSS positioning applications and space weather services.

elib-URL des Eintrags:https://elib.dlr.de/188892/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Regional characterization of ionospheric perturbations degree with GIX and SIDX
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Cahuasqui Llerena, Juan AndresAndres.Cahuasqui (at) dlr.dehttps://orcid.org/0000-0002-1783-0823NICHT SPEZIFIZIERT
Hoque, Mohammed MainulMainul.Hoque (at) dlr.dehttps://orcid.org/0000-0001-5134-4901NICHT SPEZIFIZIERT
Jakowski, NorbertNorbert.Jakowski (at) dlr.dehttps://orcid.org/0000-0003-3174-2624NICHT SPEZIFIZIERT
Nykiel, Grzegorzgrzegorz.nykiel (at) pg.edu.plNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:Juli 2022
Erschienen in:44th COSPAR Scientific Assembly
Referierte Publikation:Nein
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:Ionospheric perturbations; indices and scales; GNSS; GIX; SIDX
Veranstaltungstitel:44th COSPAR Scientific Assembly
Veranstaltungsort:Athens, Greece
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:16 Juli 2022
Veranstaltungsende:24 Juli 2022
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Kommunikation, Navigation, Quantentechnologien
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R KNQ - Kommunikation, Navigation, Quantentechnologie
DLR - Teilgebiet (Projekt, Vorhaben):R - Ionosphäre, R - Solar-Terrestrische Physik SO, R - GNSS Technologien und Dienste
Standort: Neustrelitz
Institute & Einrichtungen:Institut für Solar-Terrestrische Physik
Institut für Solar-Terrestrische Physik > Weltraumwetterbeobachtung
Hinterlegt von: Cahuasqui Llerena, Dr. Juan Andres
Hinterlegt am:14 Okt 2022 12:17
Letzte Änderung:24 Apr 2024 20:50

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