2005 | OriginalPaper | Chapter
Classes of the Equatorial Electrojet
Author : Heather McCreadie
Published in: Earth Observation with CHAMP
Publisher: Springer Berlin Heidelberg
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The equatorial electrojet signal recorded on the Overhauser Magnetometer (OVM) on board CHAMP can be divided into four classes: the classical electrojet (EEJ), the counter electrojet (CEJ), no electrojet (NEJ) and a new term, formation of the electrojet (FEJ). A statistical study on the location, period and corresponding magnetic events shows that at longitudes near 60°, 165°, 255° and 345° the morning events are CEJ, which then slowly form into FEJ near noon, and finally, as local time increases, the full EEJ is realized. All other longitude zones have only EEJ events. The reason for the occurrence of these events at certain longitudes is as yet unclear.