Midlatitude ionospheric dynamics and disturbances: Introduction

2008 ◽  
pp. 1-7 ◽  
Author(s):  
Paul M. Kintner ◽  
Anthea J. Coster ◽  
Tim Fuller-Rowell ◽  
Anthony J. Mannucci ◽  
Michael Mendillo ◽  
...  
Keyword(s):  
Ionospheric Dynamics

scholarly journals Ionospheric dynamics and drivers obtained from a physics-based data assimilation model

Radio Science ◽  
2009 ◽  
Vol 44 (1) ◽  
pp. n/a-n/a ◽  
Author(s):  
Ludger Scherliess ◽  
Donald C. Thompson ◽  
Robert W. Schunk
Keyword(s):  
Data Assimilation ◽  
Assimilation Model ◽  
Ionospheric Dynamics

scholarly journals Assimilative modeling of ionospheric dynamics for nowcasting of HF propagation channels in the presence of TIDs

Radio Science ◽  
2016 ◽  
Vol 51 (3) ◽  
pp. 184-193 ◽  
Author(s):  
L. J. Nickisch ◽  
Sergey Fridman ◽  
Mark Hausman ◽  
Shawn Kraut ◽  
George Zunich
Keyword(s):  
Hf Propagation ◽  
Ionospheric Dynamics

First results of operational ionospheric dynamics prediction for the Brazilian Space Weather program

2014 ◽  
Vol 54 (1) ◽  
pp. 22-36 ◽  
Author(s):  
Adriano Petry ◽  
Jonas Rodrigues de Souza ◽  
Haroldo Fraga de Campos Velho ◽  
André Grahl Pereira ◽  
Graham John Bailey
Keyword(s):  
Space Weather ◽  
First Results ◽  
Ionospheric Dynamics

Role of conjugate and local terminators for ionospheric dynamics at Arecibo

2014 ◽  
Author(s):  
Suman Ganguly ◽  
Christiano G. M. Brum ◽  
Nestor Aponte ◽  
Eframir Franco ◽  
Sixto Gonzalez
Keyword(s):  
Ionospheric Dynamics

Ionospheric dynamics of two geomagnetic storms at South America sector

2020 ◽  
Author(s):  
Jose Augusto Gomes Vieira ◽  
Emilia Correia ◽  
Claudio Machado Paulo ◽  
Lady Angulo ◽  
Eduardo Perez Macho
Keyword(s):  
South America ◽  
Geomagnetic Storms ◽  
Ionospheric Dynamics

Terminator field-aligned currents: A new finding from the Ionospheric Dynamics and Electrodynamics Data Assimilation Model

2014 ◽  
Vol 119 (6) ◽  
pp. 4752-4757 ◽  
Author(s):  
L. Zhu ◽  
R. W. Schunk ◽  
V. Eccles ◽  
L. Scherliess ◽  
J. J. Sojka ◽  
...  
Keyword(s):  
Data Assimilation ◽  
New Finding ◽  
Assimilation Model ◽  
Ionospheric Dynamics

Identifying ionospheric shadowing signatures of ringlets and plateaus in Saturn's C Ring

2021 ◽  
Author(s):  
Joshua Dreyer ◽  
Erik Vigren ◽  
Oleg Shebanits ◽  
Michiko Morooka ◽  
Jan-Erik Wahlund ◽  
...  
Keyword(s):  
Electron Density ◽  
Southern Hemisphere ◽  
Mass Spectrometer ◽  
Small Scale ◽  
Cassini Mission ◽  
Stellar Occultations ◽  
Lower Limits ◽  
Ionospheric Dynamics ◽  
Estimate Lower

<p>During the Grand Finale of the Cassini mission, the southern hemisphere of Saturn was shadowed by its rings and the substructures within, whose more intense shadows can be mapped to specific ionospheric altitudes. We successfully connect small-scale variations (dips) in the ionospheric H<sub>2</sub><sup>+</sup> density below 2500 km, measured by the Ion and Neutral Mass Spectrometer (INMS) during orbits 288 and 292, to the shadows of individual ringlets and plateaus in the C Ring. From the H<sub>2</sub><sup>+</sup> density signatures we estimate lower limits of the associated ringlet or plateau opacities. These will be compared with results obtained from stellar occultations. Potential implications/constraints on the ionospheric dynamics will be discussed. The ringlet and plateau shadows are not associated with obvious dips in the electron density.</p>

Ionospheric dynamic and coupling processes during geomagnetic storms

2020 ◽  
Author(s):  
Chaosong Huang
Keyword(s):  
Electric Fields ◽  
Geomagnetic Storms ◽  
Equatorial Ionosphere ◽  
Ion Composition ◽  
Hemispheric Differences ◽  
Ion Density ◽  
Ion Drift ◽  
Low Latitudes ◽  
Coupling Processes ◽  
Ionospheric Dynamics

<p>Geomagnetic storms cause the largest disturbances in the ionosphere-thermosphere system. We use measurements with satellites and ground based radars to study storm-induced variations in ionospheric plasma drift, ion density, and ion composition at low latitudes. It is found that the storm-time change of ion drift velocity in the equatorial ionosphere can reach 200-300 m/s, the change of ion density can be one or two orders of magnitude, and the change of ion composition can be 50-80%. These extremely large changes in the ionosphere can last for several hours or even a few days during the main and recovery phases of magnetic storms. The longitudinal, latitudinal and hemispheric differences of storm-time ionospheric disturbances are analyzed from measurements of multiple satellites or radar chain. Very long, continuous penetration of interplanetary electric fields to the equatorial ionosphere for 6 or even 14 hours are observed, and the time when disturbance dynamo electric fields become dominant is identified. The interplay of penetration, shielding, and disturbance dynamo electric fields in the storm-time ionosphere will be addressed. Mechanisms responsible for storm-time ionospheric dynamics will be discussed.</p>

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