Search Publications
Magnetized Mars: Transformation of Earth-like magnetosphere to Venus-like induced magnetosphere
Kallio, E.; Janhunen, P.; Barabash, S. +1 more
Using a global numerical model, we have studied how the present Martian magnetosphere may have looked in the past when the planet had a global intrinsic magnetic field. A Mars version (HYB-Mars) of the self-consistent quasi-neutral hybrid model was used which treats the ions as particles and the electrons as a massless charge-neutralizing fluid. W…
Analysis of the HASI accelerometers data measured during the impact phase of the Huygens probe on the surface of Titan by means of a simulation with a finite-element model
Bettanini, C.; Angrilli, F.; Zaccariotto, M.
The Huygens Atmospheric Structure Instrument (HASI) [Fulchignoni, M., Ferri, F., Angrilli, F., Bar-Nun, A., Barucci, M.A., Bianchini, G., Borucki, W., Coradini, M., Coustenis, A., Falkner, P., Flamini, E., Grard, R., Hamelin, M., Harri, A.M., Leppelmaier, G.W., Lopez-Moreno, J.J., McDonnell, J.A.M., McKay, C.P., Neubauer, F.M., Pedersen, A., Piaca…
Titan's surface from the Cassini RADAR radiometry data during SAR mode
Lorenz, R. D.; Janssen, M. A.; Lunine, J. I. +8 more
We present initial results on the calibration and interpretation of the high-resolution radiometry data acquired during the Synthetic Aperture Radar (SAR) mode (SAR-radiometry) of the Cassini Radar Mapper during its first five flybys of Saturn's moon Titan. We construct maps of the brightness temperature at the 2-cm wavelength coincident with SAR …
Interpretation of high rate dust measurements with the Cassini dust detector CDA
Kempf, Sascha
For two years the cosmic dust analyser (CDA) onboard the Cassini spacecraft has been exploring the dust environment of Saturn [Srama, R., Kempf, S., Moragas-Klostermeyer, G., Helfert, S., Ahrens, T. J., Altobelli, N., Auer, S., Beckmann, U., Bradley, J.G., Burton, M., Dikarev, V.V., Economou, T., Fechtig, H., Green, S.F., Grande, M., Havnes, O., H…
Radiation characteristics of quasi-periodic radio bursts in the Jovian high-latitude region
Morioka, Akira; Tsuchiya, Fuminori; Misawa, Hiroaki +2 more
Ulysses had a "distant encounter" with Jupiter in February 2004. The spacecraft passed from north to south, and it observed Jovian radio waves from high to low latitudes (from +80° to +10°) for few months during its encounter. In this study, we present a statistical investigation of the occurrence characteristics of Jovian quasi-periodic bursts, u…
HHSMT observations of the Venusian mesospheric temperature, winds, and CO abundance around the MESSENGER flyby
Hartogh, Paul; Jarchow, Christopher; Rengel, Miriam
We present submillimeter observations of 12CO J=3-2 and 2-1, and 13CO J=2-1 lines of the Venusian mesosphere and lower thermosphere with the Heinrich Hertz Submillimeter Telescope (HHSMT) taken around the second MESSENGER flyby of Venus on 5 June 2007. The observations cover a range of Venus solar elongations with different f…
Morphology of the magnetic field near Mars and the role of the magnetic crustal anomalies: Dayside region
Kallio, E.; Fedorov, A.; Janhunen, P. +2 more
We have studied the morphology of magnetic flux tubes near Mars and have found that the magnetic field lines near Mars forms a wing-like flux tube structure downstream of the bow shock. These magnetic flux tubes are concentrated close to the plane, which contains the center of Mars, the interplanetary magnetic field, and the Mars-Sun line. Regions…
Venus wind map at cloud top level with the MTR/THEMIS visible spectrometer, I: Instrumental performance and first results
Widemann, Thomas; Gaulme, Patrick; Schmider, François-Xavier +3 more
Solar light gets scattered at cloud top level in Venus' atmosphere, in the visible range, which corresponds to the altitude of 67 km. We present Doppler velocity measurements performed with the high resolution spectrometer MTR of the Solar telescope THEMIS (Teide Observatory, Canary Island) on the sodium D2 solar line (5890A˚). Observations lasted…
Reconstruction of the trajectory of the Huygens probe using the Huygens Atmospheric Structure Instrument (HASI)
Fulchignoni, M.; Leese, M. R.; Hathi, B. +13 more
The Huygens probe returned scientific measurements from the atmosphere and surface of Titan on 14 January 2005. Knowledge of the trajectory of Huygens is necessary for scientific analysis of those measurements. We use measurements from the Huygens Atmospheric Structure Instrument (HASI) to reconstruct the trajectory of Huygens during its mission. …
Occurrence and source characteristics of the high-latitude components of Jovian broadband kilometric radiation
Morioka, Akira; Tsuchiya, Fuminori; Misawa, Hiroaki +2 more
Ulysses had a "distant encounter" with Jupiter when it was within 0.8 AU of the planet during February, 2004. The passage of the spacecraft was from north to south, and observations of the Jovian radio waves were carried out for a few months from high to low latitudes (+80° to +10°) of Jupiter. The statistical study performed during this "distant …