Results 11 to 20 of about 41,349 (201)

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

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, G. J. Bailey, G. J. Bailey, Y. Z. Su, K.-I. Oyama   +4 more
doaj   +2 more sources

Response of Topside Ionospheric Electron Density During Solar Flares Using 2014–2024 Swarm Satellite Measurements

Geophysical Research Letters
This paper presents a global statistical investigation into the topside ionosphere electron density response to X‐class solar flares during geomagnetically quiet conditions (Kp ≤ 2) using Swarm satellites (462–511 km) data from 2014 to 2024.
Kenny Palo Monontsi, John Bosco Habarulema, Alessio Pignalberi, Christopher Dzivhuluwani Ndiitwani   +3 more
doaj   +2 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

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

Phenomena in the ionosphere-magnetosphere system induced by injection of powerful HF radio waves into nightside auroral ionosphere [PDF]

, 2005
International audienceExperimental results from three ionospheric HF pumping experiments in overdense E or F regions are summarized. The experiments were conducted by the use of the EISCAT HF Heating facility located near Tromsø, Norway, allowing HF ...
N. F. Blagoveshchenskaya, Bösinger, T., Rietveld, M. T., B. Thidé, Thidé, B., Borisova, T. D., T. D. Borisova, M. T. Rietveld, Kosch, M. J., V. A. Kornienko, M. J. Kosch, Blagoveshchenskaya, N. F., Kornienko, V. A., T. Bösinger   +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

Triton: Topside ionosphere and nitrogen escape [PDF]

Geophysical Research Letters, 1990
The principal ion in the ionosphere of Triton is N+. Energetic electrons of magnetospheric origin are the primary source of ionization, with a smaller contribution due to photoionization. To explain the topside plasma scale height, we postulate that N+ ions escape from Triton. The loss rate is 3.4 × 107 cm−2 s−1 or 7.9 × 1024 ions s−1.
Yung, Y. L., Lyons, J. R.
openaire   +3 more sources

Modeling of Topside Ionosphere and Plasmasphere [PDF]

, 2021
Abstract We developed a new topside ionosphere and plasmasphere model using a machine learning technique using approximately five million electron density datasets from the Japanese satellites, namely, Hinotori, Akebono, and Arase. The topside ionosphere and plasmasphere model (TIP-model) can estimate electron densities at altitudes ranging ...
Shigeto Watanabe, Yoshizumi Miyoshi, Fuminori Tsuchiya, Atsusi Kumamoto, Yoshiya Kasahara, Ayako Matsuoka, Iku Shinohara   +6 more
openaire   +1 more source

On the Analytical Description of the Topside Ionosphere by NeQuick: Modeling the Scale Height Through COSMIC/FORMOSAT-3 Selected Data

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2020
The analytical description of the topside ionosphere included in the NeQuick model is studied in detail. First, the modeled scale height behavior is analyzed at infinity and for the lowest part of the topside region; in the latter case, the analysis is ...
Alessio Pignalberi, Michael Pezzopane, David R. Themens, Haris Haralambous, Bruno Nava, Pierdavide Coisson   +5 more
doaj   +1 more source