Spatial frequencies associated with the latitudinal structures of ionospheric currents seen by CHAMP satellite
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چکیده
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15 صفحه اولFirst in-situ observation of night-time F region currents with the CHAMP satellite
[1] The CHAMP satellite in its polar, low-Earth orbit (450 km altitude) is a suitable platform for studying F region currents. High precision magnetic field measurements are used to detect and characterize these upper ionospheric currents on the Earth’s nightside. A few examples are presented to illustrate the special features of the currents and a statistical study is performed on half a year ...
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Here we give two examples of low-latitude plasma blobs accompanied by linearly polarized perpendicular magnetic deflections which imply that associated field-aligned currents (FACs) have a 2-D sheet structure located at the blob walls. The estimated FAC density is of the order of 0.1 μA/m2. The direction of magnetic deflections points westward of the magnetic meridian and there is a linear corr...
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Bursts of very intense kilometer-scale fieldaligned currents (KSFACs) are observed quite frequently by the CHAMP satellite when passing through the auroral region. In extreme cases estimated current densities exceed 3 mA/m2. Typical scale sizes of these KSFACs are 1 km. The low-Earth, polar orbiting satellite CHAMP allows one to assess KSFACs down to scales of a couple of 100 m based on its hig...
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ژورنال
عنوان ژورنال: Astrophysics and Space Science
سال: 2016
ISSN: 0004-640X,1572-946X
DOI: 10.1007/s10509-016-2787-z