HR: 1340h
AN: P33C-0255    [Abstracts]
TI: Preliminary Analysis of the Extremely Low Frequency Signals Detected With the PWA-HASI Instrument During the Descent of the Huygens Probe Through the Atmosphere of Titan
AU: * Simoes, F
EM: fernando.simoes@cetp.ipsl.fr
AF: Centre d'etude des Environments Terrestre et Plan‚taires (CETP), CNRS, 4, Avenue de Neptune, Saint Maur Cedex, F-94107 France
AU: Brown, V
P33C-0255 AF: Instituto de Astrofisica de Andalucia (IAA), CSIC, P.O. Box 3004, Granada, E-18080 Spain
AU: Chabassiere, M
P33C-0255 AF: Laboratoire de Physique et Chimie de l'Environnement (LPCE), CNRS, 3A Avenue de la Recherche Scientifique, Cedex, Orleans, F-45071 France
AU: Falkner, P
P33C-0255 AF: Science Payload and Advanced Concepts Office, ESA/ESTEC, Keplerlaan 1, Noordwijk, 2200 Netherlands
AU: Ferri, F
P33C-0255 AF: Centro Interdipartimentale Studi ed Attivit… Spaziali 'G. Colombo', Via Venezia 15, Padova, 35131 Italy
AU: Fulchignoni, M
P33C-0255 AF: Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique (LESIA), Observatoire de Paris - Meudon, 5, place Jules Janssen, cedex, Meudon, F-92195 France
AU: Grard, R
P33C-0255 AF: Research and Scientific Support Department (RSSD), ESA/ESTEC, Keplerlaan 1, Noordwijk, 2200 Netherlands
AU: Hamelin, M
P33C-0255 AF: Centre d'etude des Environments Terrestre et Plan‚taires (CETP), CNRS, 4, Avenue de Neptune, Saint Maur Cedex, F-94107 France
AU: Hofe, R
P33C-0255 AF: Institut fur Weltraumforschung (IWF), Austrian Academy of Sciences, Schmiedlstrasse 6, Graz, A-8042 Austria
AU: Jernej, I
P33C-0255 AF: Institut fur Weltraumforschung (IWF), Austrian Academy of Sciences, Schmiedlstrasse 6, Graz, A-8042 Austria
AU: Lara, L
P33C-0255 AF: Instituto de Astrofisica de Andalucia (IAA), CSIC, P.O. Box 3004, Granada, E-18080 Spain
AU: Lopez-Moreno, J
P33C-0255 AF: Instituto de Astrofisica de Andalucia (IAA), CSIC, P.O. Box 3004, Granada, E-18080 Spain
AU: Molina-Cuberos, G
P33C-0255 AF: Dpto. Fisica, Facultad de Quimicas, Universidad de Murcia, Murcia, 30100 Spain
AU: Rodrigo, R
P33C-0255 AF: Instituto de Astrofisica de Andalucia (IAA), CSIC, P.O. Box 3004, Granada, E-18080 Spain
AU: Schwingenschuh, K
P33C-0255 AF: Institut fur Weltraumforschung (IWF), Austrian Academy of Sciences, Schmiedlstrasse 6, Graz, A-8042 Austria
AU: Trautner, R
P33C-0255 AF: Research and Scientific Support Department (RSSD), ESA/ESTEC, Keplerlaan 1, Noordwijk, 2200 Netherlands
AB: The Permittivity, Waves, and Altimetry (PWA) analyzer is a subsystem of the Huygens Atmospheric Structure Instrument (HASI), onboard the Huygens Probe. Dedicated to the study of electric phenomena, the PWA instrument measured the electric field in the bandwidth 0-10kHz, during the descent of the Probe through the atmosphere of Titan. A distinctive electric signal is observed at around 36Hz, which may provide information about wave activity in the atmosphere. We present several hypotheses about the nature of this signal, related to natural phenomena taking place in the environment of Titan. It is not believed that the emission at 36Hz is induced by other instruments, the parachutes, or the Probe body. We tentatively assume that this signal is similar to the Schumann resonance observed on Earth, and we test the validity of the data set against the results from a model of the resonance of Titan's ionospheric cavity.
DE: 5405 Atmospheres (0343, 1060)
DE: 5435 Ionospheres (2459)
DE: 5494 Instruments and techniques
DE: 6281 Titan
DE: 6929 Ionospheric physics (1240, 2400)
SC: Planetary Sciences [P]
MN: Fall Meeting 2005