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An advanced physical model of cometary activity
Fulle, M.; Szegő, K.; Rodionov, A. V. +2 more
We describe the present state of an advanced physical model aimed at the simulation of the environment of active cometary nuclei. The model can handle the complicated shapes of real cometary nuclei, and is ready to handle alternative assumptions concerning the nucleus composition and structure; its present version is based on the simple, but hithe…
The charge and velocity detector of the cosmic dust analyzer on Cassini
Kempf, S.; Srama, R.; Grün, E. +2 more
The cosmic dust analyzer aboard the Cassini spacecraft includes a charge and velocity detector which senses electric charges >10 -15 C of individual cosmic dust grains as they enter the instrument. Charge is an important property of each grain, because it affects its orbital dynamics and is a measure of its size. The duration and sha…
Remote sounding of the Martian dust from ISO spectroscopy in the 2.7 µm CO 2 bands
Lellouch, E.; de Graauw, T.; Feuchtgruber, H. +2 more
This paper presents a study of Martian aerosols based on the spectral observations near 2.7 µm. Simulations by Titov et al. [Planet. Space Sci. 48 (2000) 67] showed that the depth and the shape of saturated 2.7 µm band of atmospheric CO 2 are sensitive to the presence of aerosols. This allows one to determine the aerosol opt…
Energetic ions observed by Ulysses in the Jovian magnetosheath
Karanikola, I.; Anagnostopoulos, G.
In this paper we present a survey of energetic (>∼50 keV) ion and (>∼40 keV) electron measurements made in the Jovian magnetosheath by the (Heliospheric Instrument for Spectra, Composition and Anisotropy at Low Energies) experiment onboard Ulysses, during its flyby of Jupiter in February 1992. The most common characteristics of the magnetosh…
Cosmic ray intensity variation during a CME
Kandemir, G.; Geçkinli, M.; Firat, C. +2 more
The June 6, 2000 coronal mass ejection was an exceptional full halo, which made it possible to measure cosmic ray (CR) decrease with a simple experimental set-up. Variation in the local secondary cosmic ray density has been investigated by means of gamma rays. The experiment site was located in Istanbul (41.1N, 29.0E). CR electrons and slow gamma …
The effect of instrument limitations on the derivation of plasma flows from energetic ion anisotropies, with an application to Ulysses observations at Jupiter
Cowley, S. W. H.; Kolesnikova, E.
Plasma velocities determined from the anisotropies of energetic ions via the Compton-Getting effect have been important in studies of magnetospheric flows, particularly with regard to the magnetospheres of Jupiter and Saturn. In this paper we consider a range of issues concerned with the practical limitations of such measurements, and their effect…