 |
| Titel |
A comparison of wave mode identification techniques |
| VerfasserIn |
S. N. Walker, F. Sahraoui, M. A. Balikhin, G. Belmont, J. L. Pinçon, L. Rezeau, H. Alleyne, N. Cornilleau-Wehrlin, M. André |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
0992-7689
|
| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 22, no. 8 ; Nr. 22, no. 8 (2004-09-07), S.3021-3032 |
| Datensatznummer |
250014983
|
| Publikation (Nr.) |
 copernicus.org/angeo-22-3021-2004.pdf |
|
|
|
|
|
| Zusammenfassung |
| The four point measurements available from the Cluster mission enable
spatiotemporal effects in data sets to be resolved. One application of these
multipoint measurements is the determination of the wave vectors and hence
the identification of wave modes that exist within the plasma. Prior to
multi-satellite missions, wave identification techniques were based upon the
interpretation of observational data using theoretically defined relations.
However, such techniques are limited by the quality of the data and the type
of plasma model employed. With multipoint measurements, wave modes can be
identified and their wave directions determined purely from the available
observations. This paper takes two such methods, a phase differencing
technique and k-filtering and compares their results. It is shown that both
methods can resolve the k vector for the dominant mirror mode present
in the data. The phase differencing method shows that the nature of the wave
environment is constantly changing and as such both methods result in an
average picture of the wave environment in the period analysed. The
k-filtering method is able to identify other modes that are present. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|