Field-aligned currents' scale analysis performed with the Swarm constellation

Research output: Contribution to journalJournal article – Annual report year: 2015Researchpeer-review

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Field-aligned currents' scale analysis performed with the Swarm constellation. / Lühr, Hermann; Park, Jaeheung; Gjerløv, Jesper Wittendorff; Rauberg, Jan; Michaelis, Ingo; Merayo, José M.G.; Brauer, Peter.

In: Geophysical Research Letters, Vol. 42, No. 1, 2015, p. 1-8.

Research output: Contribution to journalJournal article – Annual report year: 2015Researchpeer-review

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Lühr, Hermann ; Park, Jaeheung ; Gjerløv, Jesper Wittendorff ; Rauberg, Jan ; Michaelis, Ingo ; Merayo, José M.G. ; Brauer, Peter. / Field-aligned currents' scale analysis performed with the Swarm constellation. In: Geophysical Research Letters. 2015 ; Vol. 42, No. 1. pp. 1-8.

Bibtex

@article{e1b2388bf33f4649afa8c1766b7a6435,
title = "Field-aligned currents' scale analysis performed with the Swarm constellation",
abstract = "We present a statistical study of the temporal- and spatial-scale characteristics of different field-aligned current (FAC) types derived with the Swarm satellite formation. We divide FACs into two classes: small-scale, up to some 10 km, which are carried predominantly by kinetic Alfve´n waves, and large-scale FACs with sizes of more than 150 km. For determining temporal variability we consider measurements at the same point, the orbital crossovers near the poles, but at different times. From correlation analysis we obtain a persistent period of small-scale FACs of order 10 s, while large-scale FACs can be regarded stationary for more than 60 s. For the first time we investigate the longitudinal scales. Large-scale FACs are different on dayside and nightside. On the nightside the longitudinal extension is on average 4 times the latitudinal width, while on the dayside, particularly in the cusp region, latitudinal and longitudinal scales are comparable.",
author = "Hermann L{\"u}hr and Jaeheung Park and Gjerl{\o}v, {Jesper Wittendorff} and Jan Rauberg and Ingo Michaelis and Merayo, {Jos{\'e} M.G.} and Peter Brauer",
year = "2015",
doi = "10.1002/2014GL062453",
language = "English",
volume = "42",
pages = "1--8",
journal = "Geophysical Research Letters",
issn = "0094-8276",
publisher = "Wiley-Blackwell",
number = "1",

}

RIS

TY - JOUR

T1 - Field-aligned currents' scale analysis performed with the Swarm constellation

AU - Lühr, Hermann

AU - Park, Jaeheung

AU - Gjerløv, Jesper Wittendorff

AU - Rauberg, Jan

AU - Michaelis, Ingo

AU - Merayo, José M.G.

AU - Brauer, Peter

PY - 2015

Y1 - 2015

N2 - We present a statistical study of the temporal- and spatial-scale characteristics of different field-aligned current (FAC) types derived with the Swarm satellite formation. We divide FACs into two classes: small-scale, up to some 10 km, which are carried predominantly by kinetic Alfve´n waves, and large-scale FACs with sizes of more than 150 km. For determining temporal variability we consider measurements at the same point, the orbital crossovers near the poles, but at different times. From correlation analysis we obtain a persistent period of small-scale FACs of order 10 s, while large-scale FACs can be regarded stationary for more than 60 s. For the first time we investigate the longitudinal scales. Large-scale FACs are different on dayside and nightside. On the nightside the longitudinal extension is on average 4 times the latitudinal width, while on the dayside, particularly in the cusp region, latitudinal and longitudinal scales are comparable.

AB - We present a statistical study of the temporal- and spatial-scale characteristics of different field-aligned current (FAC) types derived with the Swarm satellite formation. We divide FACs into two classes: small-scale, up to some 10 km, which are carried predominantly by kinetic Alfve´n waves, and large-scale FACs with sizes of more than 150 km. For determining temporal variability we consider measurements at the same point, the orbital crossovers near the poles, but at different times. From correlation analysis we obtain a persistent period of small-scale FACs of order 10 s, while large-scale FACs can be regarded stationary for more than 60 s. For the first time we investigate the longitudinal scales. Large-scale FACs are different on dayside and nightside. On the nightside the longitudinal extension is on average 4 times the latitudinal width, while on the dayside, particularly in the cusp region, latitudinal and longitudinal scales are comparable.

U2 - 10.1002/2014GL062453

DO - 10.1002/2014GL062453

M3 - Journal article

VL - 42

SP - 1

EP - 8

JO - Geophysical Research Letters

JF - Geophysical Research Letters

SN - 0094-8276

IS - 1

ER -