Occurrence of Giant Travelling Ionospheric Disturbances at Night

Nature ◽  
1959 ◽  
Vol 183 (4658) ◽  
pp. 383-384 ◽  
Author(s):  
L. H. HEISLER
Keyword(s):  
Ionospheric Disturbances ◽  
Travelling Ionospheric Disturbances

scholarly journals A study of atmospheric gravity waves and travelling ionospheric disturbances at equatorial latitudes

1997 ◽  
Vol 15 (8) ◽  
pp. 1048-1056 ◽  
Author(s):  
R. L. Balthazor ◽  
R. J. Moffett
Keyword(s):  
Gravity Waves ◽  
Large Scale ◽  
Ionospheric Disturbance ◽  
Magnetic Equator ◽  
Ionospheric Disturbances ◽  
Atmospheric Gravity Waves ◽  
Opposite Hemisphere ◽  
Travelling Ionospheric Disturbances ◽  
F Region ◽  
Atmospheric Gravity

Abstract. A global coupled thermosphere-ionosphere-plasmasphere model is used to simulate a family of large-scale imperfectly ducted atmospheric gravity waves (AGWs) and associated travelling ionospheric disturbances (TIDs) originating at conjugate magnetic latitudes in the north and south auroral zones and subsequently propagating meridionally to equatorial latitudes. A 'fast' dominant mode and two slower modes are identified. We find that, at the magnetic equator, all the clearly identified modes of AGW interfere constructively and pass through to the opposite hemisphere with unchanged velocity. At F-region altitudes the 'fast' AGW has the largest amplitude, and when northward propagating and southward propagating modes interfere at the equator, the TID (as parameterised by the fractional change in the electron density at the F2 peak) increases in magnitude at the equator. The amplitude of the TID at the magnetic equator is increased compared to mid-latitudes in both upper and lower F-regions with a larger increase in the upper F-region. The ionospheric disturbance at the equator persists in the upper F-region for about 1 hour and in the lower F-region for 2.5 hours after the AGWs first interfere, and it is suggested that this is due to enhancements of the TID by slower AGW modes arriving later at the magnetic equator. The complex effects of the interplays of the TIDs generated in the equatorial plasmasphere are analysed by examining neutral and ion winds predicted by the model, and are demonstrated to be consequences of the forcing of the plasmasphere along the magnetic field lines by the neutral air pressure wave.

The Observation of Large Scale Travelling Ionospheric Disturbances Based on GPS Network

2002 ◽  
Vol 45 (4) ◽  
pp. 469-475 ◽  
Author(s):  
Dong-He ZHANG ◽  
K. Igarashi ◽  
Zuo XIAO ◽  
Guan-Yi MA
Keyword(s):  
Large Scale ◽  
Ionospheric Disturbances ◽  
Travelling Ionospheric Disturbances ◽  
Gps Network

TRAVELLING IONOSPHERIC DISTURBANCES OVER THE MAGNETIC EQUATOR

1980 ◽  
pp. 173-176
Author(s):  
C. Raghava Reddi ◽  
S. Vaidyanathan
Keyword(s):  
Magnetic Equator ◽  
Ionospheric Disturbances ◽  
Travelling Ionospheric Disturbances

TechTIDE: Warning and Mitigation Technologies for Travelling Ionospheric Disturbances Effects

2019 ◽  
Author(s):  
Anna Belehaki ◽  
Ivan Galkin ◽  
Claudia Borries ◽  
Pedro Pintor ◽  
David Altadill ◽  
...  
Keyword(s):  
Ionospheric Disturbances ◽  
Travelling Ionospheric Disturbances

scholarly journals A review of atmospheric gravity waves and travelling ionospheric disturbances: 1982-1995

1996 ◽  
Vol 14 (9) ◽  
pp. 917-940 ◽  
Author(s):  
K. Hocke ◽  
K. Schlegel
Keyword(s):  
Gravity Waves ◽  
Ionospheric Disturbances ◽  
Atmospheric Gravity Wave ◽  
Atmospheric Gravity Waves ◽  
Travelling Ionospheric Disturbances ◽  
The Past ◽  
Low Latitudes ◽  
Subsequent Propagation ◽  
Atmospheric Gravity ◽  
Inversion Techniques

Abstract. Recent investigations of atmospheric gravity waves (AGW) and travelling ionospheric disturbances (TID) in the Earth\\'s thermosphere and ionosphere are reviewed. In the past decade, the generation of gravity waves at high latitudes and their subsequent propagation to low latitudes have been studied by several global model simulations and coordinated observation campaigns such as the Worldwide Atmospheric Gravity-wave Study (WAGS), the results are presented in the first part of the review. The second part describes the progress towards understanding the AGW/TID characteristics. It points to the AGW/TID relationship which has been recently revealed with the aid of model-data comparisons and by the application of new inversion techniques. We describe the morphology and climatology of gravity waves and their ionospheric manifestations, TIDs, from numerous new observations.

Observation of nighttime medium-scale travelling ionospheric disturbances by two 630-nm airglow imagers near the auroral zone

2013 ◽  
Vol 103 ◽  
pp. 184-194 ◽  
Author(s):  
K. Shiokawa ◽  
M. Mori ◽  
Y. Otsuka ◽  
S. Oyama ◽  
S. Nozawa ◽  
...  
Keyword(s):  
Auroral Zone ◽  
Ionospheric Disturbances ◽  
Medium Scale ◽  
Travelling Ionospheric Disturbances
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