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Published in:
2005 | OriginalPaper | Chapter
Detection of Intense Fine-Scale Field-Aligned Current Structures in the Cusp Region
Authors : Peter Stauning, Freddy Christiansen, Jürgen Watermann
Published in: Earth Observation with CHAMP
Publisher: Springer Berlin Heidelberg
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The Ørsted high-precision magnetic measurements made at high temporal resolution of 25 and occasionally 100 samples/sec corresponding to spatial resolutions down to less than 100 m have demonstrated the occurrences of highly structured field-aligned currents (FAC) in the low-altitude Cusp region. The observed magnetic perturbations indicate structures of very intense but thin sheets or narrow filaments of mixed up- and downward currents up to several hundreds of µA/m
2
embedded in large-scale FAC structures of only up to a few µA/m
2
. The intensities and locations of fine-scale FAC structures are closely related to solar wind conditions.