scholarly journals Investigation of ionospheric electron content variations before earthquakes in southern California, 2003–2004

2007 ◽  
Vol 112 (B2) ◽  
Author(s):  
Thomas Dautermann ◽  
Eric Calais ◽  
Jennifer Haase ◽  
James Garrison
Keyword(s):  
Southern California ◽  
Electron Content ◽  
Ionospheric Electron Content

scholarly journals Ionospheric Electron Content During Solar Cycle 23

2018 ◽  
Vol 123 (6) ◽  
pp. 5223-5231 ◽  
Author(s):  
Stanley C. Solomon ◽  
Liying Qian ◽  
Anthony J. Mannucci
Keyword(s):  
Solar Cycle ◽  
Electron Content ◽  
Solar Cycle 23 ◽  
Ionospheric Electron Content

scholarly journals Ionospheric electron content: the European perspective

1998 ◽  
Vol 41 (5-6) ◽  
Author(s):  
R. Leitinger
Keyword(s):  
Working Party ◽  
Artificial Satellites ◽  
Electron Content ◽  
European Perspective ◽  
Radio Science ◽  
Geophysical Interpretation ◽  
Propagation Effects ◽  
Ionospheric Electron Content ◽  
Radio Signals ◽  
The University

The electron content of the ionosphere is an important quantity which indicates overall ionization. It is measured by means of propagation effects on radio signals which penetrate the ionosphere. In Europe relevant investigations started after the launch of the first artificial satellites. Soon the necessity arose to organize international cooperation: the regional as well as the global geographical distribution of ionization parameters is important knowledge for any meaningful geophysical interpretation of ionization parameters. Despite the fact that international scientific Unions and Committees existed and had proven their usefulness and potential, private initiatives were taken to organize cooperation in the field of research based on transionospheric propagation effects. Only in 1971 three international groups joined together to form the "Beacon Satellite Group"as a "Working Party" of COSPAR. The "Beacon Satellite Group" still exists but is now a Working Group of URSI, the International Union for Radio Science. This contribution tries to summarize the European perspective with special emphasis on the long standing cooperation between the Istituto di Ricerca sulle Onde Elettromagnetiche (IROE) at Firenze and the Institut für Meteorologie und Geophysik of the University of Graz. Examples are given of important results.

scholarly journals Study of mid-latitude nighttime enhancement in F-region electron density using tomographic images over the UK

2003 ◽  
Vol 21 (12) ◽  
pp. 2323-2328 ◽  
Author(s):  
R. S. Dabas ◽  
L. Kersley
Keyword(s):  
Electron Density ◽  
Magnetic Activity ◽  
Electron Content ◽  
Equatorial Anomaly ◽  
Tomographic Images ◽  
F Region ◽  
Electron Density Gradient ◽  
Modeling And Forecasting ◽  
Ionospheric Electron Content ◽  
The Uk

Abstract. Nighttime enhancements in ionospheric electron content (IEC)/peak electron density (NmF2) have been studied by various workers in the equatorial anomaly and mid-latitude regions. Such studies give an idea about their enhancement over that location only. In the present study tomographic images over the UK, which give a latitudinal versus height distributions of ionospheric electron density in a much wider area, have been used to study the anomalous increases in nighttime F-region electron density at mid-latitudes. From the analysis of four seasonal representative months (November 1997, March, June and October 1998) data it was noted that the majority of the cases of nighttime enhancements were observed after local midnight, with a maximum between 03:00–04:00 LT in the month of November 1997. Enhancements were observed mostly between 45–50° N latitudes, and their positions are not affected by magnetic activity (Kp ) variations, whereas the separation between the mid-latitude trough and enhancement decreases with increases in magnetic activity. This finding shows that only the trough moves equatorward with the increase in magnetic activity. It is also noted that the electron density gradient from the trough to the enhancement increases with an increase in Kp. Results are discussed in terms of downward plasma transport from the protonosphere to the ionosphere and the nighttime neutral winds.Key words. Ionosphere (mid-latitude ionosphere; modeling and forecasting; instruments and techniques)

CYGNSS-based Ionospheric Electron Content Estimation: An Analysis

2014 ◽  
Author(s):  
Jordi Xing ◽  
Seebany Datta-Barua ◽  
James Garrison ◽  
Aaron Ridley ◽  
Boris Pervan
Keyword(s):  
Electron Content ◽  
Ionospheric Electron Content
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