Modeling of the upper transition height from the topside electron density profiles

0452849 - ÚFA 2016 TH eng A - Abstrakt
Truhlík, Vladimír - Třísková, Ludmila - Bilitza, D. - Kotov, D. - Benson, R. F. - Chu, P. - Wang, Y. - Bogomaz, O. V. - Domnin, I. F.
Modeling of the upper transition height from the topside electron density profiles.
18th IRI-2015 Workshop. Bangkok: COSPAR/URSI IRI Working Group and Faculty of Engineering (KMITL), 2015. s. 760.
[International Reference Ionosphere 2015 (IRI-2015) Workshop /18./. 02.11.2015-13.11.2015, Bangkok]
Institucionální podpora: RVO:68378289
Klíčová slova: plasmasphere * inner magnetosphere * electron density profiles
Kód oboru RIV: BL - Fyzika plazmatu a výboje v plynech
http://www.iri2015.kmitl.ac.th/downloads/IRI2015_TechnicalProgram.pdf

The transition from dominance of heavy atomic ions (mainly O+) to light ions (H+ and He+) is an important boundary representing the transition from the ionosphere to the plasmasphere/inner magnetosphere. It strongly depends on solar and geophysical conditions. We processed a large data-base of Alouette and ISIS topside sounder electron density profiles and of Formosat-3/COSMIC vertical electron-density profiles Ne(h) using theoretical plasma distribution to fit the vertical density profiles to the Ne(h) profiles and to determine hT. We also describe our recent efforts to extent the data-base by processing existing digital ionograms especially from ISIS-1 using the Topside Ionogram Scalar with True-Height (TOPIST) software. Global distributions of hT for primarily low solar activity conditions were modeled using spherical harmonics and the results are presented here. We compare these results with data from other types of measurements (Atmosphere Explorer C&E and C/NOFS satellites, the Kharkiv incoherent scatter radar) and with the AEIKion-13 model that is introduced as an improved IRI2012/TTS-03 option for ion composition. Possible inclusion of the hT model in IRI is discussed.
Trvalý link: http://hdl.handle.net/11104/0253775