Zobrazeno 1 - 10
of 23
pro vyhledávání: '"M. Waara"'
Publikováno v:
Annales Geophysicae, Vol 30, Pp 1309-1314 (2012)
We present a comparative study of low frequency electric field spectral densities and temperatures observed by the Cluster spacecraft in the high altitude cusp/mantle region. We compare the relation between the O+ temperature and wave intensity at
Externí odkaz:
https://doaj.org/article/8a348f14797d4aac9d2c750e6d009e32
Publikováno v:
Annales Geophysicae, Vol 29, Pp 931-944 (2011)
We use the Cluster spacecraft to study three events with intense waves and energetic oxygen ions (O+) in the high altitude cusp and mantle. The ion energies considered are of the order 1000 eV and higher, observed above an altitude of 8 earth radi
Externí odkaz:
https://doaj.org/article/e0513028272b4aeb94ffcc086e8e2f93
Publikováno v:
Annales Geophysicae, Vol 29, Pp 945-954 (2011)
We present a statistical study of the low (+ gyrofrequency (0.02–0.5 Hz) for this region the electric field spectral density is on average 0.2–2.2 (mV m−1)2 Hz−1, implying that resonant heating at the gyrofrequency can be intense enough to
Externí odkaz:
https://doaj.org/article/7bc30dd4689540b1bdb92c537a5cd437
Publikováno v:
Annales Geophysicae, Vol 28, Pp 907-916 (2010)
We present a case study of significant heating (up to 8 keV) perpendicular to the geomagnetic field of outflowing oxygen ions at high altitude (12 RE) above the polar cap. The shape of the distribution functions indicates that most of the heating
Externí odkaz:
https://doaj.org/article/ae9a594038ef4587a9114b6471034cd4
Autor:
H. Nilsson, M. Waara, O. Marghitu, M. Yamauchi, R. Lundin, H. Rème, J.-A. Sauvaud, I. Dandouras, E. Lucek, L. M. Kistler, B. Klecker, C. W. Carlson, M. B. Bavassano-Cattaneo, A. Korth
Publikováno v:
Annales Geophysicae, Vol 26, Pp 3365-3373 (2008)
Oxygen ion outflow associated with the cusp and cleft give rise to persistent oxygen ion beams which can be observed over the polar cap. For high altitude spacecraft such as Cluster these beams are often observed for several hours on each occasion
Externí odkaz:
https://doaj.org/article/cced20a64a4241cd9c083cba68e466d3
Autor:
H. Nilsson, M. Waara, O. Marghitu, M. Yamauchi, R. Lundin, H. Rème, J.-A. Sauvaud, I. Dandouras, E. Lucek, L. M. Kistler, B. Klecker, C. W. Carlson, M. B. Bavassano-Cattaneo, A. Korth
Publikováno v:
Annales Geophysicae, Vol 26, Pp 145-157 (2008)
The role of the centrifugal acceleration mechanism for ion outflow at high altitude above the polar cap has been investigated. Magnetometer data from the four Cluster spacecraft has been used to obtain an estimate of magnetic field gradients. Thi
Externí odkaz:
https://doaj.org/article/e8ab5de3fea340348e983d2a8bac366d
Autor:
H. Nilsson, M. Waara, S. Arvelius, O. Marghitu, M. Bouhram, Y. Hobara, M. Yamauchi, R. Lundin, H. Rème, J.-A. Sauvaud, I. Dandouras, A. Balogh, L. M. Kistler, B. Klecker, C. W. Carlson, M. B. Bavassano-Cattaneo, A. Korth
Publikováno v:
Annales Geophysicae, Vol 24, Pp 1099-1112 (2006)
The results of a statistical study of oxygen ion outflow using Cluster data obtained at high altitude above the polar cap is reported. Moment data for both hydrogen ions (H+) and oxygen ions (O+) from 3 years (2001-2003) of spring orbits (Januar
Externí odkaz:
https://doaj.org/article/9388cc4dcd594e62a3f59644949c7099
Autor:
H. Nilsson, M. Waara, S. Arvelius, O. Marghitu, M. Bouhram, Y. Hobara, M. Yamauchi, R. Lundin, H. Rème, J.-A. Sauvaud, I. Dandouras, A. Balogh, L. M. Kistler, B. Klecker, C. W. Carlson, M. B. Bavassano-Cattaneo, A. Korth
Publikováno v:
Annales Geophysicae
Annales Geophysicae, European Geosciences Union, 2006, 24 (3), pp.1099-1112
Scopus-Elsevier
Annales Geophysicae, 2006, 24 (3), pp.1099-1112
Annales Geophysicae, Vol 24, Pp 1099-1112 (2006)
Annales Geophysicae, Vol 24, Iss 3, Pp 1099-1112 (2006)
Annales Geophysicae, European Geosciences Union, 2006, 24 (3), pp.1099-1112
Scopus-Elsevier
Annales Geophysicae, 2006, 24 (3), pp.1099-1112
Annales Geophysicae, Vol 24, Pp 1099-1112 (2006)
Annales Geophysicae, Vol 24, Iss 3, Pp 1099-1112 (2006)
The results of a statistical study of oxygen ion outflow using Cluster data obtained at high altitude above the polar cap is reported. Moment data for both hydrogen ions (H+) and oxygen ions (O+) from 3 years (2001-2003) of spring orbits (January to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dd973bedb221041cd515a877129dd3d1
https://www.ann-geophys.net/24/1099/2006/
https://www.ann-geophys.net/24/1099/2006/
Autor:
H. Nilsson, M. Waara, O. Marghitu, M. Yamauchi, R. Lundin, H. Rème, J.-A. Sauvaud, I. Dandouras, E. Lucek, L. M. Kistler, B. Klecker, C. W. Carlson, M. B. Bavassano-Cattaneo, A. Korth
Publikováno v:
Annales Geophysicae, Vol 26, Iss 11, Pp 3365-3373 (2008)
Scopus-Elsevier
Annales Geophysicae, Vol 26, Pp 3365-3373 (2008)
Scopus-Elsevier
Annales Geophysicae, Vol 26, Pp 3365-3373 (2008)
Oxygen ion outflow associated with the cusp and cleft give rise to persistent oxygen ion beams which can be observed over the polar cap. For high altitude spacecraft such as Cluster these beams are often observed for several hours on each occasion. T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::50dcc2c781bb64009911a117266a549a
https://www.ann-geophys.net/26/3365/2008/
https://www.ann-geophys.net/26/3365/2008/
Publikováno v:
Annales Geophysicae, Vol 30, Pp 1309-1314 (2012)
We present a comparative study of low frequency electric field spectral densities and temperatures observed by the Cluster spacecraft in the high altitude cusp/mantle region. We compare the relation between the O+ temperature and wave intensity at th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b0f2bd0f079cd5f73a77b7f40ebb09bf
https://www.ann-geophys.net/30/1309/2012/angeo-30-1309-2012.pdf
https://www.ann-geophys.net/30/1309/2012/angeo-30-1309-2012.pdf