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Analysis of the electric and magnetic fields time variation inside the auroral oval region
KTH, School of Electrical Engineering (EES), Space and Plasma Physics.
2015 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The Master's thesis is part of a more comprehensive research topic aimed at investigating

the interaction between the magnetosphere and the ionosphere. The study of the

temporal variation of the eld aligned currents in the auroral region was done through

analyzing Electric and Magnetic eld data downloaded from the ESA Cluster Active

Archive and gathered through in situ measurements by the tetrahedral Cluster satellite

constellation. The four satellites have an almost identical orbit, with a distance separation

ranging between a hundred kilometers to several thousand kilometers. This allows

for the measurement of the Electric and Magnetic elds associated with Birkeland currents

in the same spatial region at four dierent times. By performing a cross-correlation

between any two spacecraft measurements we obtain six correlation coecients along

with the corresponding time lags, which can then be used to study the lifetime of the

associated eld aligned currents. Further data analysis and interpretation is then performed

to obtain a better understanding of the temporal stability of auroral structures

and the intrinsic coupling between the ionosphere and the magnetosphere.

Place, publisher, year, edition, pages
2015. , 67 p.
EES Examensarbete / Master Thesis, XR-EE-SPP 2014:006
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
URN: urn:nbn:se:kth:diva-160613OAI: diva2:790541
Educational program
Master of Science - Electrophysics
Available from: 2015-02-25 Created: 2015-02-25 Last updated: 2015-02-25Bibliographically approved

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