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Storm-time patterns of Center-of-Mass of the ionosphere

Tamara Gulyaeva - IZMIRAN; Haris Haralambous - Frederick Research Center, Cyprus; Bruno Nava - ICTP, Italy; Iwona Stanislawska - Space Research Center, Poland

Session: Thermosphere-Ionosphere Interactions and Effects


Abstract

Modern telecommunication and navigation systems can suffer from degradation or loss of signals at the severe perturbations of the ionospheric plasma during the space weather storms. We present results of analysis of the ionospheric global maps GIMs during 1994-2020. GIM-TECs are assimilated by IRI-Plas system to produce instantaneous F2 layer maps of foF2 (or NmF2), hmF2 and the slab-thickness GIM-tau which represents ratio of TEC to NmF2 at each cell of a map. The slab-thickness tau includes its bottom part, tau_bot, below hmF2, and topside, tau_top. The IRI-Plas and NeQuick production of electron density height profile Ne(h) is complemented by calculation of electron content height profile,TEC(h), from the lower boundary of the ionosphere, 65km, to 20,000km (GPS orbit). The Center-of-Mass of the ionosphere Hc is evaluated from slab-thickness model within the range from (hmF2-tau_bot) to (hmF2+tau_top). Analysis of GIM-Hc maps under quiet and storm conditions shows effect of appreciable uplifting Hc during the ionospheric storm. Statistical characteristics of GIM-Hc maps can serve for validation and updating the shell height model with Hc parameter varying over the globe for improved vertical TEC evaluation from STEC observations. This study is supported by RFBR 19-52-25001_Kipr_a, Russia, and RPF Bilateral/Russia(RFBR)1118/0004 (RENUM), Cyprus.



Approaching deadlines:

Registration opens:

16 July 2020

Abstract submission opens:

16 July 2020

European Space Weather Medals:

6 September 2020

Registration deadline:

25 September 2020

Registration deadline: [extended]

10 October 2020

Abstract submission deadline:

4 September 2020