Results 11 to 20 of about 2,463,485 (172)

Simulation of Transient Topside Layer in the Martian Ionosphere

Remote Sensing, 2023
Many Mars missions, e.g., Mariner, Viking, Mars Global Surveyor (MGS), Mars Express (MEX), and Mars Atmosphere and Volatile Evolution (MAVEN), have been launched to study the Martian atmosphere.
Chunhua Jiang, Rong Tian, Lehui Wei
doaj   +2 more sources

New formulation for the topside ionosphere and plasmasphere based on NeQuick

Journal of Space Weather and Space Climate
The total electron content (TEC) affecting signal propagation of Global Navigation Satellite Systems (GNSS) is strongly influenced by the topside ionosphere and plasmasphere. This study introduces a new approach to representing the two regions.
Prol Fabricio dos Santos, Pignalberi Alessio, Smirnov Artem   +2 more
doaj   +2 more sources

Electon density profiles of the topside ionosphere [PDF]

Annals of Geophysics, 2002
The existing uncertainties about the electron density profiles in the topside ionosphere, i.e., in the height region from h m F 2 to ~ 2000 km, require the search for new data sources.
D. Bilitza, B. W. Reinisch, X. Huang, R. F. Benson   +3 more
doaj   +5 more sources

Validation of the IRI‐2020 Model Topside Ionosphere Options Through COSMIC‐1 and COSMIC‐2 Radio Occultation Profiles Collocated With Ionosonde Observations

Space Weather
This study validates the four topside ionosphere model options included in the latest release of the International Reference Ionosphere (IRI‐2020) model: IRI‐2001, IRI‐2001cor, IRI‐NeQuick, and the default IRI‐COR2.
A. Pignalberi, H. Haralambous, D. Bilitza, P. Coïsson, B. Nava, M. Pezzopane, F. Prol, A. Smirnov, D. R. Themens, C. Xiong   +9 more
doaj   +2 more sources

Geometric total electron content models for topside ionospheric sounding [PDF]

2014 IEEE Workshop on Environmental, Energy, and Structural Monitoring Systems Proceedings, 2014
The ionosphere is commonly divided into the portion below (bottomside) and above (topside) the region at which peak values of electron density occur. Topside ionospheric modeling is a challenging problem because of the limited data available. Indeed, the more intense peak ionization region, or bottomside ionosphere, dominates the effects observable ...
Urbano Tancredi, Alfredo Renga, Michele Grassi   +2 more
openaire   +3 more sources

IRI Model Specification of the Upper Transition Height at the Equatorial Region: Comparison Against a Dedicated Model Based on C/NOFS Data During Low Solar Activity

Space Weather
The Upper Transition Height (UTH) is a critical parameter for understanding topside ionosphere dynamics. This study evaluates the UTH performance of the International Reference Ionosphere (IRI) model using the TBT15 ion composition option and compares it
Fabricio Prol, Alessio Pignalberi, Artem Smirnov   +2 more
doaj   +2 more sources

ESA Swarm Satellites Plasma Density Products: Comparison and Validation Against Incoherent Scatter Radars Observations

Space Weather
The European Space Agency's Swarm mission has provided over a decade of continuous in situ measurements of the topside ionospheric plasma. With the release of various official plasma density products and the development of several calibration methods ...
Alessio Pignalberi, Artem Smirnov, Chao Xiong, Vladimir Truhlik, Roberta Forte, Michael Pezzopane, Vincenzo Ventriglia, Luca Spogli, Lucilla Alfonsi   +8 more
doaj   +2 more sources

He+ dominance in the plasmasphere during geomagnetically disturbed periods: 1. Observational results [PDF]

, 2002
Observations made by the DMSP 1710 satellite during the recovery phase from geomagnetic disturbances in June 1991 show regions of He+ dominance around 830 km altitude at 09:00 MLT.
Wilford, C. R., Bailey, G.J., G. J. Bailey, Denton, M.H., Bailey, G. J., Wilford, C.R., Rodger, A. S., Rodger, A.S., Venkatraman, S., Denton, M. H., C. R. Wilford, A. S. Rodger, S. Venkatraman, M. H. Denton   +13 more
core   +6 more sources

An analysis of pump-induced artificial ionospheric ion upwelling at EISCAT [PDF]

, 2010
Ion outflow from the high-latitude ionosphere is a well-known phenomenon and an important source of plasma for the magnetosphere. It is also well known that pumping the ionosphere with high-power high-frequency radio waves causes electron heating.
Kosch, M.J., Ogawa, Y., Nozawa, S., Fujii, R., Rietveld, M.T.   +4 more
core   +4 more sources

Topside ionospheric vertical electron density profile reconstruction using GPS and ionosonde data: possibilities for South Africa [PDF]

Annales Geophysicae, 2011
Successful empirical modeling of the topside ionosphere relies on the availability of good quality measured data. The Alouette, ISIS and Intercosmos-19 satellite missions provided large amounts of topside sounder data, but with limited coverage of ...
P. Sibanda, P. Sibanda, P. Sibanda, L. A. McKinnell, L. A. McKinnell   +4 more
doaj   +1 more source