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Author |
Masson, S., Klein, K.-L., Buetikofer, R., Flueckiger, E., Kurt, V., Yushkov B. & Krucker, S. |
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Title |
Acceleration of Relativistic Protons during the 20 January 2005 Flare and CME |
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Journal Article |
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Year |
2009 |
Publication |
SOLAR PHYSICS |
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Volume |
257 |
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305 |
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227 |
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0038-0938 |
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5862 |
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Author |
K.-L. Klein |
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Title |
Le rayonnement cosmique, ch. de l'ouvrage “L'astronomie au service de tous”, IMCCE/CNRS |
Type |
Book Chapter |
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Year |
2009 |
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88 |
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227 |
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5863 |
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Author |
JJ. Leveque, A. Maggi, A. Delladio, J. Burdin, JY. Thore, A. Morelli |
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Title |
ConCorDia: a new, permanent seismological station in Antarctica. EGU General Assembly, Vienna, 2008 |
Type |
Conference - International - Poster |
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Year |
2008 |
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European Geophysical Society
Concordia (Dome C) is the site of a permanent seismic observatory station, CCD,
which has been running since 2005. The station is placed 1 km away from the inhabited
part of the base, and consists of a vault at 12 m below snow level and a shelter on
the surface. While the acquisition electronics operate at temperate conditions (0-20C)
in the shelter, the seismometers are placed in the vault at a stable temperature of -60C,
well below design specifications.
Our first policy was to run the seismometers (two Streckeisen STS-2s) at this temperature,
because heating induces small variations in temperature that in turn add noise to
the seismic signals. This policy led to a first difficulty in re-centering the instruments
at temperatures below -45C, resulting in poorly centered seismometers at the steady
state temperature of -60C. Secondly, and more importantly, the signal – of good quality
during the first few weeks/months – ultimately degraded and became useless (spurious
and frequent oscillations and spikes of unknown origin).
As of 2007, we have relaxed our no-heating policy, and are heating one of the two instruments.
In order to avoid convection which is the most likely source of temperature
perturbation, we installed our heating elements at the top of the volume in order to create
a stable stratified temperature gradient. The temperature at the base of the heated
STS-2 is now -30C. It seems, from the information we currently have available, that
the heated seismometer performs much better. We shall present a more detailed analysis
of the data from the heated and unheated systems, based on the complete 2007
dataset. |
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906 |
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Serial |
5864 |
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Author |
Leveque JJ, Wittlinger G, Maggi A. |
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Title |
The ice-layer in Antarctica : preliminary results from seismology, AGU Fall Meeting, San Francisco |
Type |
Conference - International - Poster |
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Year |
2009 |
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Abstract |
EOS, Transactions, American Geophysical Union |
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906 |
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5865 |
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Author |
Souriau A, Leveque JJ, Maggi A |
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Title |
Seismological constraints on ice properties at Dome C, Antarctica, from H/V measurements, AGU Fall Meeting, San Francisco. |
Type |
Conference - International - Poster |
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Year |
2009 |
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Abstract |
EOS, Transactions, American Geophysical Union |
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906 |
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5866 |
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Conference - National - Poster |
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Year |
2008 |
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131 |
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5871 |
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Title |
Transcriptional analysis of skeletal muscle adaptations to marine life in king penguin juveniles (Aptenodytes patagonicus). |
Type |
Conference - International - Communication |
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Year |
2009 |
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Abstract |
Experimental Biology – New Orleans – 18-22 avril 2009 |
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131 |
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5872 |
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Author |
GRISELIN M., MARLIN Ch., LAFFLY D., BERNARD E., DELANGLE E., FRIEDT J-M., SCHWAMBORN G. et TOLLE F. |
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Conference - International - Communication |
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2009 |
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5875 |
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Author |
GRISELIN M., MARLIN Ch., LAFFLY D., BERNARD E., DELANGLE E., FRIEDT J-M., SCHWAMBORN G. et TOLLE F. |
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Conference - International - Communication |
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2009 |
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5877 |
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MARLIN Ch., GRISELIN M., BERNARD E., DELANGLE E., LAFFLY D., FRIEDT J-M |
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Conference - International - Communication |
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2009 |
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5878 |
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