Physics
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agusmsa43a..06a&link_type=abstract
American Geophysical Union, Spring Meeting 2008, abstract #SA43A-06
Physics
2400 Ionosphere (6929), 2409 Current Systems (2721), 2411 Electric Fields (2712), 2415 Equatorial Ionosphere, 2494 Instruments And Techniques
Scientific paper
The CHAMP satellite, launched in July 2000, provides more than 7 years of ionospheric magnetic measurements at low altitudes. The Equatorial Electrojet (EEJ) produces a strong signal in these magnetic measurements, which have been inverted for high-quality meridional current profiles. These profiles contain key information on the eastward electric field which drives the current system. By solving the governing differential equation for each of over 40,000 CHAMP equator crossings, we have produced estimates of the eastward electric field with global coverage. These estimates have been found to be consistent with ground based measurements at the JULIA radar at Jicamarca, Peru. The resulting data set provides valuable new information on the longitudinal, seasonal and local time structure of the day-side eastward electric field.
Alken Patrick
Maus Stefan
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