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Storm Induced Large Scale Tids Observed in Gps Derived Tec : Volume 27, Issue 4 (03/04/2009)

By Borries, C.

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Book Id: WPLBN0003979439
Format Type: PDF Article :
File Size: Pages 8
Reproduction Date: 2015

Title: Storm Induced Large Scale Tids Observed in Gps Derived Tec : Volume 27, Issue 4 (03/04/2009)  
Author: Borries, C.
Volume: Vol. 27, Issue 4
Language: English
Subject: Science, Annales, Geophysicae
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2009
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Jakowski, N., Wilken, V., & Borries, C. (2009). Storm Induced Large Scale Tids Observed in Gps Derived Tec : Volume 27, Issue 4 (03/04/2009). Retrieved from http://members.worldlibrary.net/


Description
Description: DLR, Institute for Communication and Navigation, Kalkhorstweg 53, 17235 Neustrelitz, Germany. This work is a first statistical analysis of large scale traveling ionospheric disturbances (LSTID) in Europe using total electron content (TEC) data derived from GNSS measurements. The GNSS receiver network in Europe is dense enough to map the ionospheric perturbation TEC with high horizontal resolution. The derived perturbation TEC maps are analysed studying the effect of space weather events on the ionosphere over Europe.

Equatorward propagating storm induced wave packets have been identified during several geomagnetic storms. Characteristic parameters such as velocity, wavelength and direction were estimated from the perturbation TEC maps. Showing a mean wavelength of 2000 km, a mean period of 59 min and a phase speed of 684 ms−1 in average, the perturbations are allocated to LSTID. The comparison to LSTID observed over Japan shows an equal wavelength but a considerably faster phase speed. This might be attributed to the differences in the distance to the auroral region or inclination/declination of the geomagnetic field lines.

The observed correlation between the LSTID amplitudes and the Auroral Electrojet (AE) indicates that most of the wave like perturbations are exited by Joule heating. Particle precipitation effects could not be separated.


Summary
Storm induced large scale TIDs observed in GPS derived TEC

Excerpt
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