 |
| Titel |
What can we learn from HF signal scattered from a discrete arc? |
| VerfasserIn |
E. Seran, M. Godefroy, K. Kauristie, J.-C. Cerisier, J.-J. Berthelier, Mark Lester, L.-E. Sarri |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
0992-7689
|
| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 27, no. 5 ; Nr. 27, no. 5 (2009-05-04), S.1887-1896 |
| Datensatznummer |
250016507
|
| Publikation (Nr.) |
 copernicus.org/angeo-27-1887-2009.pdf |
|
|
|
|
|
| Zusammenfassung |
| We present observations of a discrete southward
propagating arc which appeared in the mid-night sector at latitudes
equatorward of main substorm activity. The arc observations were made
simultaneously by the ALFA (Auroral Light Fine Analysis) optical camera, the
SuperDARN-CUTLASS HF radar and the Demeter satellite during a coordinated
multi-instrumental campaign conducted at the KEOPS/ESRANGE site in December
2006. The SuperDARN HF signal which is often lost in the regions of strong
electron precipitation yields in our case clear backscatter from an isolated
arc of weak intensity. Consequently we are able to study arc dynamics, the
formation of meso-scale irregularities of the electron density along the
arc, compare the arc motion with the convection of surrounding plasma and
discuss the contribution of ionospheric ions in the arc erosion and its
propagation. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|