|Author||Haal, S. E. ♦ Paschmann, G. ♦ Förster, M. ♦ Quinn, J. M. ♦ Torbert, R. B. ♦ Mcilwain, C. E. ♦ Vaith, H. ♦ Puhl-Quinn, P. A. ♦ Kletzing, C. A.|
|Subject Domain (in DDC)||Computer science, information & general works ♦ Data processing & computer science|
|Subject Keyword||High-latitude Plasma Convection ♦ Cluster Edi Measurement ♦ Data Set ♦ Electron Drift Instrument ♦ Edi Measurement ♦ 30-min Average ♦ Polar Ionosphere ♦ Contour Map ♦ Electron Drift Velocity ♦ Ionospheric Drift Vector ♦ Interplanetary Magnetic Field ♦ Stable Imf ♦ Statistical Map ♦ Imf Variation ♦ Edi Data ♦ Vector Measurement ♦ Geocentric Distance ♦ Electric Potential|
|Abstract||Abstract. We have used vector measurements of the electron drift velocity made by the Electron Drift Instrument (EDI) on Cluster between February 2001 and March 2006 to derive statistical maps of the high-latitude plasma convection. The EDI measurements, obtained at geocentric distances between ∼4 and ∼20 RE over both hemispheres, are mapped into the polar ionosphere, and sorted according to the clock-angle of the interplanetary magnetic field (IMF), measured at ACE and propagated to Earth, using best estimates of the orientation of the IMF variations. Only intervals of stable IMF are used, based on the magnitude of a “bias-vector ” constructed from 30-min averages. The resulting data set consists of a total of 5862 h of EDI data. Contour maps of the electric potential in the polar ionosphere are subsequently derived from the mapped and averaged ionospheric drift vectors. Comparison|
|Educational Role||Student ♦ Teacher|
|Age Range||above 22 year|
|Education Level||UG and PG ♦ Career/Technical Study|
|Learning Resource Type||Article|
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