Electric fields and zonal winds in the equatorial ionosphere inferred from CHAMP satellite magnetic measurements
Abstract
The Equatorial Electrojet (EEJ) produces a strong magnetic signal in measurements of the low‐orbiting CHAMP satellite. Six years of data with more than 30,000 dayside equator crossings provide a unique data basis to study this current system. In addition to scalar measurements used in previous studies, we have also inverted vector magnetic field measurements to gain accurate meridional profiles of the eastward current in the equatorial region. By solving the relevant differential equation, the CHAMP‐derived current profiles can be inverted for the driving zonal electric fields and zonal winds. As a result of this feasibility study, we suggest an inversion of the complete set of individual CHAMP EEJ current profiles, which will provide valuable new information on dayside electric fields and thermospheric winds at low latitudes.
Description
Date
2007-12-16
Keywords
Equatorial electrojet , Zonal electric field , Zonal wind
Citation
Maus, S., Alken, P., & Lühr, H. (2007). Electric fields and zonal winds in the equatorial ionosphere inferred from CHAMP satellite magnetic measurements. Geophysical Research Letters, 34 (23), L23102. https://doi.org/10.1029/2007GL030859
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Authors
Publisher
American Geophysical Union