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Journal Article

Scale analysis of equatorial plasma irregularities derived from Swarm constellation

Authors
/persons/resource/bear

Xiong,  C.
2.3 Earth's Magnetic Field, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

/persons/resource/cstolle

Stolle,  Claudia
2.3 Earth's Magnetic Field, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

/persons/resource/hluehr

Lühr,  H.
2.3 Earth's Magnetic Field, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Park,  Jaeheung
External Organizations;

Fejer,  Bela G.
External Organizations;

/persons/resource/gmk

Kervalishvili,  G.
2.3 Earth's Magnetic Field, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

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1659889.pdf
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Citation

Xiong, C., Stolle, C., Lühr, H., Park, J., Fejer, B. G., Kervalishvili, G. (2016): Scale analysis of equatorial plasma irregularities derived from Swarm constellation. - Earth Planets and Space, 68, 121.
https://doi.org/10.1186/s40623-016-0502-5


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_1659889
Abstract
In this study, we investigated the scale sizes of equatorial plasma irregularities (EPIs) using measurements from the Swarm satellites during its early mission and final constellation phases. We found that with longitudinal separation between Swarm satellites larger than 0.4°, no significant correlation was found any more. This result suggests that EPI structures include plasma density scale sizes less than 44 km in the zonal direction. During the Swarm earlier mission phase, clearly better EPI correlations are obtained in the northern hemisphere, implying more fragmented irregularities in the southern hemisphere where the ambient magnetic field is low. The previously reported inverted-C shell structure of EPIs is generally confirmed by the Swarm observations in the northern hemisphere, but with various tilt angles. From the Swarm spacecrafts with zonal separations of about 150 km, we conclude that larger zonal scale sizes of irregularities exist during the early evening hours (around 1900 LT).