| 1. |
- Boralv, E, et al.
(författare)
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The dawn and dusk electrojet response to substorm onset
- 2000
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Ingår i: ANNALES GEOPHYSICAE-ATMOSPHERES HYDROSPHERES AND SPACE SCIENCES. - : SPRINGER-VERLAG. - 0992-7689. ; 18:9, s. 1097-1107
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Tidskriftsartikel (refereegranskat)abstract
- We have investigated the time delay between substorm onset and related reactions in the dawn and dusk ionospheric electrojets, clearly separated from the nightside located substorm current wedge by several hours in MLT. We looked for substorm onsets occur
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| 2. |
- Karlsson, SBP, et al.
(författare)
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Solar wind control of magnetospheric energy content: Substorm quenching and multiple onsets
- 2000
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Ingår i: JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS. - : AMER GEOPHYSICAL UNION. - 0148-0227. ; 105:A3, s. 5335-5356
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Tidskriftsartikel (refereegranskat)abstract
- In this paper we report coordinated multispacecraft and ground-based observations of a double substorm onset close to Scandinavia on November 17, 1996. The Wind and the Geotail spacecraft, which were located in the solar wind and the subsolar magnetosheat
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| 3. |
- KAURISTIE, K, et al.
(författare)
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ANALYSIS OF THE SUBSTORM TRIGGER PHASE USING MULTIPLE GROUND-BASED INSTRUMENTATION
- 1995
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Ingår i: GEOPHYSICAL RESEARCH LETTERS. - : AMER GEOPHYSICAL UNION. - 0094-8276. ; 22:15, s. 2065-2068
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- During the substorm trigger phase, i.e. during the last few minutes before the onset, the slowly and linearly developing growth phase features strengthen exponentially. Often the enhanced auroral activity fades abruptly during a couple of minutes just pri
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| 4. |
- Kauristie, K, et al.
(författare)
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Auroral precipitation fading before and at substorm onset: ionospheric and geostationary signatures
- 1997
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Ingår i: ANNALES GEOPHYSICAE-ATMOSPHERES HYDROSPHERES AND SPACE SCIENCES. - : SPRINGER VERLAG. - 0992-7689. ; 15:8, s. 967-983
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Rapid fading of auroral activity a few minutes before substorm breakup has earlier been analyzed in case-studies. Here we report on a study in which all-sky camera (ASC) and magnetic data over 3 years were examined to find breakups that were accompanied b
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| 5. |
- Kauristie, K, et al.
(författare)
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What can we tell about global auroral electrojet activity from a single meridional magnetometer chain?
- 1996
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Ingår i: ANNALES GEOPHYSICAE-ATMOSPHERES HYDROSPHERES AND SPACE SCIENCES. - : SPRINGER VERLAG. - 0992-7689. ; 14:11, s. 1177-1185
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- The AE indices are generally used for monitoring the level of magnetic activity in the auroral oval region. In some cases, however, the oval is either so expanded or contracted that the latitudinal coverage of the AE magnetometer chain is not adequate. Th
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| 6. |
- LOCKWOOD, M, et al.
(författare)
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OPPORTUNITIES FOR MAGNETOSPHERIC RESEARCH USING EISCAT/ESR AND CLUSTER
- 1995
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Ingår i: JOURNAL OF GEOMAGNETISM AND GEOELECTRICITY. - : TERRA SCIENTIFIC PUBL CO. - 0022-1392. ; 47:8, s. 699-719
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- The four Cluster spacecraft offer a unique opportunity to study structure and dynamics in the magnetosphere and we discuss four general ways in which ground-based remote-sensing observations of the ionosphere can be used to support the in-situ measurement
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| 7. |
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| 8. |
- Olsson, A, et al.
(författare)
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Particle precipitation in auroral breakups and westward traveling surges
- 1996
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Ingår i: JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS. - : AMER GEOPHYSICAL UNION. - 0148-0227. ; 101:A11, s. 24661-24673
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- We have used data from the European Incoherent Scatter (EISCAT) facility to determine the characteristics of particle precipitation before and within auroral breakups and westward traveling surges. The EISCAT data of electron density versus altitude were
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| 9. |
- Opgenoorth, HJ
(författare)
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Ground-based supporting programmes for the IASTP
- 1997
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Ingår i: RESULTS OF THE IASTP PROGRAM. - : PERGAMON PRESS LTD. - 0273-1177. ; 20:4-5, s. 609-620
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- During the coming years there will be an unprecedented opportunity to study structure and dynamics of the magnetosphere. A fleet of specialised spacecraft will very much increase our possibilities to simultaneously monitor various magnetospheric regions.
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| 10. |
- Opgenoorth, HJ, et al.
(författare)
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Opportunities for magnetospheric research with coordinated cluster and ground-based observations
- 1997
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Ingår i: SPACE SCIENCE REVIEWS. - : KLUWER ACADEMIC PUBL. - 0038-6308. ; 79:1-2, s. 599-637
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- ESA's first multi-satellite mission Cluster is unique in its concept of 4 satellites orbiting in controlled formations. This will give an unprecedented opportunity to study structure and dynamics of the magnetosphere. In this paper we discuss ways in whic
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