Analysis of plasmaspheric plumes: CLUSTER and IMAGE observations
Plasmaspheric plumes have been routinely observed by CLUSTER and IMAGE. The CLUSTER mission provides high time resolution four-point measurements of the plasmasphere near perigee. Total electron density profiles have been derived from the electron plasma frequency identified by the WHISPER sounde...
| Main Authors: | , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2006-07-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/24/1737/2006/angeo-24-1737-2006.pdf |
| _version_ | 1828464676256612352 |
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| author | F. Darrouzet J. De Keyser P. M. E. Décréau D. L. Gallagher V. Pierrard J. F. Lemaire J. F. Lemaire B. R. Sandel I. Dandouras H. Matsui M. Dunlop J. Cabrera A. Masson P. Canu J. G. Trotignon J. L. Rauch M. André |
| author_facet | F. Darrouzet J. De Keyser P. M. E. Décréau D. L. Gallagher V. Pierrard J. F. Lemaire J. F. Lemaire B. R. Sandel I. Dandouras H. Matsui M. Dunlop J. Cabrera A. Masson P. Canu J. G. Trotignon J. L. Rauch M. André |
| author_sort | F. Darrouzet |
| collection | DOAJ |
| description | Plasmaspheric plumes have been routinely observed by CLUSTER and IMAGE. The
CLUSTER mission provides high time resolution four-point measurements of the
plasmasphere near perigee. Total electron density profiles have been derived
from the electron plasma frequency identified by the WHISPER sounder
supplemented, in-between soundings, by relative variations of the spacecraft
potential measured by the electric field instrument EFW; ion velocity is
also measured onboard these satellites. The EUV imager onboard the IMAGE
spacecraft provides global images of the plasmasphere with a spatial
resolution of 0.1 <i>R<sub>E</sub></i> every 10 min; such images acquired near apogee
from high above the pole show the geometry of plasmaspheric plumes, their
evolution and motion. We present coordinated observations of three plume
events and compare CLUSTER in-situ data with global images of the
plasmasphere obtained by IMAGE. In particular, we study the geometry and the
orientation of plasmaspheric plumes by using four-point analysis methods. We
compare several aspects of plume motion as determined by different methods:
(i) inner and outer plume boundary velocity calculated from time delays of
this boundary as observed by the wave experiment WHISPER on the four
spacecraft, (ii) drift velocity measured by the electron drift instrument
EDI onboard CLUSTER and (iii) global velocity determined from successive EUV
images. These different techniques consistently indicate that plasmaspheric
plumes rotate around the Earth, with their foot fully co-rotating, but with
their tip rotating slower and moving farther out. |
| first_indexed | 2024-12-11T03:18:41Z |
| format | Article |
| id | doaj.art-b9f3c46ab42a48229b71ca6bcd879d32 |
| institution | Directory Open Access Journal |
| issn | 0992-7689 1432-0576 |
| language | English |
| last_indexed | 2024-12-11T03:18:41Z |
| publishDate | 2006-07-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Annales Geophysicae |
| spelling | doaj.art-b9f3c46ab42a48229b71ca6bcd879d322022-12-22T01:22:41ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05762006-07-01241737175810.5194/angeo-24-1737-2006Analysis of plasmaspheric plumes: CLUSTER and IMAGE observationsF. Darrouzet0J. De Keyser1P. M. E. Décréau2D. L. Gallagher3V. Pierrard4J. F. Lemaire5J. F. Lemaire6B. R. Sandel7I. Dandouras8H. Matsui9M. Dunlop10J. Cabrera11A. Masson12P. Canu13J. G. Trotignon14J. L. Rauch15M. André16Belgian Institute for Space Aeronomy (IASB-BIRA), Brussels, BelgiumBelgian Institute for Space Aeronomy (IASB-BIRA), Brussels, BelgiumLaboratoire de Physique et Chimie de l’Environnement (LPCE), CNRS and University of Orléans, Orléans, FranceMarshall Space Flight Center (MSFC), NASA, Huntsville, Alabama, USABelgian Institute for Space Aeronomy (IASB-BIRA), Brussels, BelgiumCenter for Space Radiation (CSR), Louvain la Neuve, BelgiumBelgian Institute for Space Aeronomy (IASB-BIRA), Brussels, BelgiumLunar and Planetary Laboratory (LPL), University of Arizona, Tucson, Arizona, USACentre d’Etude Spatiale des Rayonnements (CESR), CNRS, Toulouse, FranceSpace Science Center (SSC), University of New Hampshire, Durham, New Hampshire, USASpace Sciences Division (SSTD), Rutherford Appleton Laboratory (RAL), Chilton, Didcot, Oxfordshire, UKCenter for Space Radiation (CSR), Louvain la Neuve, BelgiumResearch and Scientific Support Department (RSSD), ESTEC-ESA, Noordwijk, The NetherlandsCentre d’étude des Environnements Terrestre et Planétaires (CETP), CNRS, Vélizy, FranceLaboratoire de Physique et Chimie de l’Environnement (LPCE), CNRS and University of Orléans, Orléans, FranceLaboratoire de Physique et Chimie de l’Environnement (LPCE), CNRS and University of Orléans, Orléans, FranceSwedish Institute of Space Physics (IRFU), Uppsala division, Uppsala, SwedenPlasmaspheric plumes have been routinely observed by CLUSTER and IMAGE. The CLUSTER mission provides high time resolution four-point measurements of the plasmasphere near perigee. Total electron density profiles have been derived from the electron plasma frequency identified by the WHISPER sounder supplemented, in-between soundings, by relative variations of the spacecraft potential measured by the electric field instrument EFW; ion velocity is also measured onboard these satellites. The EUV imager onboard the IMAGE spacecraft provides global images of the plasmasphere with a spatial resolution of 0.1 <i>R<sub>E</sub></i> every 10 min; such images acquired near apogee from high above the pole show the geometry of plasmaspheric plumes, their evolution and motion. We present coordinated observations of three plume events and compare CLUSTER in-situ data with global images of the plasmasphere obtained by IMAGE. In particular, we study the geometry and the orientation of plasmaspheric plumes by using four-point analysis methods. We compare several aspects of plume motion as determined by different methods: (i) inner and outer plume boundary velocity calculated from time delays of this boundary as observed by the wave experiment WHISPER on the four spacecraft, (ii) drift velocity measured by the electron drift instrument EDI onboard CLUSTER and (iii) global velocity determined from successive EUV images. These different techniques consistently indicate that plasmaspheric plumes rotate around the Earth, with their foot fully co-rotating, but with their tip rotating slower and moving farther out.https://www.ann-geophys.net/24/1737/2006/angeo-24-1737-2006.pdf |
| spellingShingle | F. Darrouzet J. De Keyser P. M. E. Décréau D. L. Gallagher V. Pierrard J. F. Lemaire J. F. Lemaire B. R. Sandel I. Dandouras H. Matsui M. Dunlop J. Cabrera A. Masson P. Canu J. G. Trotignon J. L. Rauch M. André Analysis of plasmaspheric plumes: CLUSTER and IMAGE observations Annales Geophysicae |
| title | Analysis of plasmaspheric plumes: CLUSTER and IMAGE observations |
| title_full | Analysis of plasmaspheric plumes: CLUSTER and IMAGE observations |
| title_fullStr | Analysis of plasmaspheric plumes: CLUSTER and IMAGE observations |
| title_full_unstemmed | Analysis of plasmaspheric plumes: CLUSTER and IMAGE observations |
| title_short | Analysis of plasmaspheric plumes: CLUSTER and IMAGE observations |
| title_sort | analysis of plasmaspheric plumes cluster and image observations |
| url | https://www.ann-geophys.net/24/1737/2006/angeo-24-1737-2006.pdf |
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