onr:"swepub:oai:DiVA.org:kth-39266"
Search: onr:"swepub:oai:DiVA.org:kth-39266" > On the origin of th...
- 1 of 1
- Previous record
- Next record
- To hitlist
- Aikio, A T (author)
On the origin of the high-altitude electric field fluctuations in the auroral zone
- Article/chapterEnglish1996
Publisher, publication year, extent ...
- 1996
- printrdacarrier
Numbers
- LIBRIS-ID:oai:DiVA.org:kth-39266
- https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-39266URI
- https://doi.org/10.1029/96JA02020DOI
Supplementary language notes
- Language:English
- Summary in:English
Part of subdatabase
- SwePubSwePub
Classification
Notes
- NR 20140805
- Intense fluctuations in the electric field at high altitudes in the auroral zone are frequently measured by the Viking satellite. We have made an analysis of the origin of electric and magnetic fluctuations in the frequency range of 0.1 - 1 Hz by assuming four different sources for the signals: (I) spatial structures, (2) spatial structures with a parallel potential drop below the satellite, (3) traveling; shear Alfven waves, and (4) interfering shear Alfven waves. We will shaw that these different sources of the signals may produce similar amplitude ratios and phase differences between the perpendicular electric and magnetic fields. Since the different sources have different frequency dependencies, this can be used as an additional test if the signals are broadband. In other cases, additional information is needed, for example, satellite particle measurements or ground; magnetic measurements. The ideas presented in the theory were tested for one Viking eveningside pass over Scandinavia, where ground-based magnetometer and EISCAT radar measurements were available. The magnetic conditions were active during this pass and several interfering shear Alfven waves were found. Also, a spatial structure with a parallel potential drop below the satellite was identified. The magnitude of the 10-km-wide potential drop was at least 2 kV and the upward field-aligned current 26 mu A m(-2) (value mapped to the ionospheric level). The held-aligned conductance was estimated as 1.3 - 2.2x10(-8) S m(-2).
Subject headings and genre
Added entries (persons, corporate bodies, meetings, titles ...)
- Blomberg, LarsKTH,Alfvénlaboratoriet,Rymd- och plasmafysik(Swepub:kth)u1sm5h8r (author)
- Marklund, GöranKTH,Alfvénlaboratoriet,Rymd- och plasmafysik(Swepub:kth)u1yq52h6 (author)
- Yamauchi, M (author)
- KTHAlfvénlaboratoriet (creator_code:org_t)
Related titles
- In:Journal of Geophysical Research101:A12, s. 27157-271700148-02272156-2202
Internet link
Find in a library
- Journal of Geophysical Research (Search for host publication in LIBRIS)
To the university's database
- 1 of 1
- Previous record
- Next record
- To hitlist
Find more in SwePub
- By the author/editor
- Aikio, A T
- Blomberg, Lars
- Marklund, Göran
- Yamauchi, M
- About the subject
-
- NATURAL SCIENCES
- NATURAL SCIENCES
- and Physical Science ...
- and Fusion Plasma an ...
- Articles in the publication
- Journal of Geoph ...
- By the university
- Royal Institute of Technology
Search outside SwePub
- Extend your search to:
- Google Book Search
- Google Scholar
Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.
- Copyright © LIBRIS - National Library Systems
- LIBRIS.kb.se
