Search Publications
Response of the mid-altitude cusp to rapid rotations of the IMF
Escoubet, C. P.; Pitout, F.; Fazakerley, A. N. +3 more
On 12 August 2003, the four Cluster spacecraft crossed the mid-altitude cusp one after the other a minute or two apart. Shortly after the cusp crossing, two of the Cluster observed three structures poleward of the cusp that appeared and grew in successive satellite passes. In these structures, high fluxes of low-energy magnetosheath-like ions and …
CLUSTER observation of collisionless transport at the magnetopause
Fränz, M.; Dandouras, I.; Rème, H. +5 more
On May 10, 2002 the CLUSTER spacecraft (SC) encountered a ~450 km (five magnetosheath thermal proton gyro-radii) wide high-latitude magnetopause (MP). Magnetic field observations indicate the crossing of a ~130 km thick MP current sheet (CS) located inside a magnetic hole. Proton flux measurements diagnose a dense boundary layer (BL) directly atta…
Remote sensing of a magnetotail reconnection X-line using polar rain electrons
Lucek, E.; Owen, C. J.; Sergeev, V. +3 more
We report on electron phase space distributions (PSDs) observed near the plasma sheet (PS) boundary layer (PSBL) by the Cluster electron spectrometers when the northern lobe was occupied by significant fluxes of polar rain (PR) electrons. These observations reveal the spatial structure of the electron transition layer (TL) between the polar rain e…
Comment on ``Estimated solar contribution to the global surface warming using the ACRIM TSI satellite composite'' by N. Scafetta and B. J. West
Lean, Judith L.
Abstract Available from http://www.agu.org
Vertical atmospheric flow on Titan as measured by the HASI instrument on board the Huygens probe
Tokano, Tetsuya; Ferri, Francesca; Mäkinen, J. Teemu T. +3 more
On January 14, 2005, the Huygens probe descended on the surface of Titan, the largest moon of Saturn and the only moon in the Solar system with a substantial atmosphere. After the deployment of the main parachute and the release of the heat shield at an altitude of about 150 km, the local pressure and temperature were measured by HASI (Huygens Atm…
New multi-fluid MHD model of comet 26P/Grigg-Skjellerup: Extrapolation to comet 67P/Churyumov-Gerasimenko
Benna, M.; Mahaffy, P. R.
The Multi-fluid MHD simulator CASIM3D models the atmosphere of comet 26P/Grigg-Skjellerup as it was seen by the Giotto spacecraft during its flyby of the comet in July 1992. CASIM3D integrates the major chemical reactions and physical interactions to compute self-consistently over an adaptive Cartesian mesh the dynamics of ions, electrons, and neu…
Effects of nonlinearity on the structure of PSBL beamlets
Zelenyi, L. M.; Ashour-Abdalla, M.; Dolgonosov, M. S. +1 more
We investigate the nonlinear influence of the cross-tail currents carried by beamlets (substructures of PSBL ion beams) on the topology of the magnetic field, and, correspondingly, on the dispersion properties of these substructures self-consistently generated in this field. We found that some of the peculiarities of beamlet shapes found recently …
Mapping sub-pixel surface roughness on Mars using high-resolution satellite image data
Gillespie, Alan R.; Mushkin, Amit
The ratio between co-registered pixels in stereo or repeat image pairs is used to constrain the deviation of the Martian surface from Lambertian reflection due to unresolved shadows at the pixel scale of orbiting imagers. Relative differences between the ratios primarily reflect differences in the effective amount of shadows `seen' by the sensor i…
Reconstructing the weather on Mars at the time of the MERs and Beagle 2 landings
Withers, P.; Lewis, S. R.; Read, P. L. +1 more
We reconstruct the temperature, wind and density structure of the atmosphere on Mars from the surface to 120 km altitude at the time of the landing of the two NASA Mars Exploration Rovers (MER), and ESA's ``Beagle 2.'' This reconstruction is based on an assimilation of temperature and dust opacity observations from the Thermal Emission Spectromete…
Implication for the solar wind effect on the Io plasma torus
Kimura, T.; Misawa, H.; Yamamoto, H. +7 more
Sporadic enhancements of [SII] 673.1 nm emissions from the Io plasma torus were found in ground-based observations in 1998 and 1999. Just after the onset of the enhancement on September 21, 1999, narrow-band kilometric (nKOM) radiation began to be observed by the Galileo/PWS in the Jovian magnetosphere. During this period, quasi-periodic burst gro…