Results 11 to 20 of about 1,563 (166)
A novel neural network model of Earth’s topside ionosphere [PDF]
Scientific Reports, 2023 The Earth’s ionosphere affects the propagation of signals from the Global Navigation Satellite Systems (GNSS). Due to the non-uniform coverage of available observations and complicated dynamics of the region, developing accurate models of the ionosphere ...
Artem Smirnov +6 more
doaj +2 more sources
New formulation for the topside ionosphere and plasmasphere based on NeQuick
Journal of Space Weather and Space ClimateThe 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 +2 more
doaj +2 more sources
Yearly variations in the low-latitude topside ionosphere [PDF]
Annales Geophysicae, 2000 Observations made by the Hinotori satellite have been analysed to determine the yearly variations of the electron density and electron temperature in the low-latitude topside ionosphere.
G. J. Bailey +4 more
doaj +2 more sources
Plasma transport in the topside venus ionosphere [PDF]
Planetary and Space Science, 1977 Abstract We have studied the extent to which certain transport processes affect ion composition and heat flow in the daytime, topside Venus ionosphere. Particular attention is given to the conditions that prevailed during the Mariner 5 measurements, at which time the topside Venus ionosphere appeared to be in a state of diffusive equilibrium. We have
Schunk, Robert W., St. -Maurice, J. -P.
openaire +3 more sources
Combined model of topside ionosphere and plasmasphere derived from radio-occultation and Van Allen Probes data [PDF]
Scientific Reports, 2022 In the last years, electron density profile functions characterized by a linear dependence on the scale height showed good results when approximating the topside ionosphere. The performance above 800 km, however, is not yet well investigated.
Fabricio S. Prol +3 more
doaj +2 more sources
Electon density profiles of the topside ionosphere
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. The ISIS and Alouette topside sounder satellites from the sixties to the eighties recorded millions of ionograms but most were not analyzed in terms of electron density ...
D. Bilitza +3 more
core +6 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 +4 more
doaj +1 more source
The impact of a stealth CME on the Martian topside ionosphere [PDF]
Monthly Notices of the Royal Astronomical Society, 2021 ABSTRACT Solar cycle 24 is one of the weakest solar cycles recorded, but surprisingly the declining phase of it had a slow coronal mass ejection (CME) that evolved without any low coronal signature and is classified as a stealth CME that was responsible for an intense geomagnetic storm at Earth (Dst = −176 nT).
Smitha V Thampi +3 more
openaire +2 more sources
Remote Sensing, 2022 The study of electrical currents in the topside ionosphere is of great importance, as it may allow a better understanding of the processes involved in the Sun–Earth interaction and magnetosphere–ionosphere–thermosphere coupling, two crucial aspects ...
Fabio Giannattasio +6 more
doaj +1 more source
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. +13 more
core +1 more source