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| Titel |
Spatial and temporal properties of AKR burst emission derived from Cluster WBD VLBI studies |
| VerfasserIn |
R. L. Mutel, D. A. Gurnett, I. W. Christopher |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 22, no. 7 ; Nr. 22, no. 7 (2004-07-14), S.2625-2632 |
| Datensatznummer |
250014951
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| Publikation (Nr.) |
 copernicus.org/angeo-22-2625-2004.pdf |
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| Zusammenfassung |
| We have determined the locations of over 6000 individual auroral kilometric
radiation (AKR) bursts between July 2002 and May 2003 using a very long
baseline interferometer (VLBI) array. Burst locations were determined by
triangulation using differential delays from cross-correlated Cluster WBD
waveforms. Typical position uncertainties are 200-400km in the plane
normal to the source-spacecraft line, but much larger along this line.
The AKR bursts are generally located above the auroral zone with a strong
preference for the evening sector (22:00 MLT±2h). However, a few
epochs imaged during the austral summer have loci in the daytime sector,
especially near 15:00 MLT. There is
marginal evidence for a small N-S hemispheric asymmetry in mean MLT and
invariant latitude. |
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