Neutral density depletions associated with equatorial plasma bubbles as observed by the CHAMP satellite
نویسندگان
چکیده
منابع مشابه
Field-aligned current associated with low-latitude plasma blobs as observed by the CHAMP satellite
Here we give two examples of low-latitude plasma blobs accompanied by linearly polarized perpendicular magnetic deflections which imply that associated field-aligned currents (FACs) have a 2-D sheet structure located at the blob walls. The estimated FAC density is of the order of 0.1 μA/m2. The direction of magnetic deflections points westward of the magnetic meridian and there is a linear corr...
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[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 ...
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From geomagnetic field observations of CHAMP during 2001–2009 we extracted characteristic signatures of inter-hemispheric field-aligned currents (IHFACs) in the equatorial ionosphere. The results are in general agreement with previous observations. Nighttime IHFACs are negligibly small. Solstitial IHFACs flow from the summer to winter (from winter to summer) hemisphere at dawn (around noon). Du...
متن کاملQuasi-Analytic Models for Density Bubbles and Plasma Clouds in the Equatorial Ionosphere
The equatorial ionosphere contains imbedded bubbles that rise though a horizontally stratified plasma. The motion of the bubbles are affect by gravity, neutral winds or external electric fields which produce electric fields in the F-Region density perturbations of the bubbles. Exact solutions for the electric potentials are derived assuming linear or circular symmetry to the density structures ...
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ژورنال
عنوان ژورنال: Journal of Atmospheric and Solar-Terrestrial Physics
سال: 2010
ISSN: 1364-6826
DOI: 10.1016/j.jastp.2009.11.003