Improving and testing the empirical equatorial electrojet model with CHAMP satellite data
نویسندگان
چکیده
منابع مشابه
Spatio-temporal characterization of the equatorial electrojet from CHAMP, Ørsted, and SAC-C satellite magnetic measurements
[1] The equatorial electrojet (EEJ) is an eastward electric current on the day-side, flowing in a narrow band along the dip equator in the ionospheric E region. Recent magnetic observations from the CHAMP, Ørsted, and SAC-C satellites, comprising more than 95,000 dip equator crossings from 1999 to 2006, have provided an unprecedented longitudinal coverage of the EEJ magnetic signature. We have ...
متن کاملNoon-time equatorial electrojet: Its spatial features as determined by the CHAMP satellite
[1] New observations obtained by the satellite CHAMP reveal a detailed picture of the noon-time equatorial electrojet (EEJ). The low orbit of CHAMP and its high-precision magnetometers reveal the spatial structure of the EEJ with unprecedented accuracy. Data from more than two and a half years have been used to investigate average features and also the global characteristics of the EEJ. Rather ...
متن کاملA study of local time and longitudinal variability of the amplitude of the equatorial electrojet observed in POGO satellite data
The local time and longitudinal variations of the amplitude of the equatorial electrojet (EE) are investigated using the POGO series satellite data. An iterative normalization scheme is developed to separate the variations of the amplitude of the EE with respect to longitude and local time. The resulting local time variation of the EE compares favorably with observatory based studies; however, ...
متن کاملElectric fields and zonal winds in the equatorial ionosphere inferred from CHAMP satellite magnetic measurements
[1] 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 prof...
متن کاملElectric fields in the equatorial ionosphere derived from individual CHAMP satellite orbits
The day-time eastward equatorial electric field (EEF) in the E-region plays an important role in equatorial ionospheric dynamics. It is responsible for driving the equatorial electrojet (EEJ) current system, equatorial vertical ion drifts, and the equatorial ionization anomaly (EIA). Due to its importance, there is much interest in accurately measuring the EEF. However, there is a severe lack o...
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ژورنال
عنوان ژورنال: Annales Geophysicae
سال: 2004
ISSN: 1432-0576
DOI: 10.5194/angeo-22-3323-2004