2026-04-17T01:50:51Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/1254912026-01-21T06:39:22Zcom_2072_1033col_2072_452950

00925njm 22002777a 4500 dc Kotov, Dmytro author Richards, Philip G. author Truhlík, Vladimír author Hernández Pajares, Manuel author 2018-08 This paper reports the results of ionosphere and plasmasphere observations with the Kharkiv incoherent scatter radar and ionosonde, Defense Meteorological Satellite Program, and Arase (ERG) satellites and simulations with field line interhemispheric plasma model during the equinoxes and solstices of solar minimum 24. The results reveal the need to increase NRLMSISE-00 thermospheric hydrogen density by a factor of ~2. For the first time, it is shown that the measured plasmaspheric density can be reproduced with doubled NRLMSISE-00 hydrogen density only. A factor of ~2 decrease of plasmaspheric density in deep inner magnetosphere (L ˜ 2.1) caused by very weak magnetic disturbance (Dst > 22 nT) of 24 December 2017 was observed in the morning of 25 December 2017. During the next night, prominent effects of partially depleted flux tube were observed in the topside ionosphere (~50% reduced H+ ion density) and at the F2-layer peak (~50% decreased electron density). The likely physical mechanisms are discussed. Peer Reviewed Postprint (published version) Àrees temàtiques de la UPC::Matemàtiques i estadística::Matemàtica aplicada a les ciències Àrees temàtiques de la UPC::Física::Astronomia i astrofísica Geophysics Astronomy and astrophysics Geofísica Astrofísica Classificació AMS::86 Geophysics Classificació AMS::85 Astronomy and astrophysics Coincident observations by the Kharkiv IS radar and ionosonde, DMSP and Arase (ERG) satellites, and FLIP model simulations: implications for the NRLMSISE-00 hydrogen density, plasmasphere, and ionosphere