Journal
GEOPHYSICAL RESEARCH LETTERS
Volume 31, Issue 9, Pages -Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1029/2004GL019558
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Spatial gradients of high-speed flows in the midtail plasma sheet are determined using multipoint observations from the Cluster spacecraft along the dawn-dusk'' direction (perpendicular to the main flow and in the plane of the tail current sheet) and along the north-south direction. If we take the average or median of the spatial gradients and assume that the flow channel has a linear gradient, these values suggest that the full width of the flow channel is 2-3 R-E in the dawn-dusk'' direction and 1.5-2 R-E in the north-south direction. The velocity gradient at the duskward edge of a flow tends to be sharper than that at the dawnward edge, possibly reflecting an asymmetry in the magnetosphere-ionosphere coupling process associated with the flow.
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