Now showing items 11-20 of 97
Combined first and second order Fermi acceleration at comets
(Elsevier, 1989)
Our two-dimensional, time-dependent model calculations indicate that an interplay between velocity and spatial diffusion may be responsible for the acceleration of implanted heavy ions in the cometary preshock region. ...
Isotopic Composition of H, HE and NE in the Protosolar Cloud
(Kluwer Academic Publishers; Springer Science+Business Media, 2003-03)
Observations and measurements in the solar wind, the Jovian atmosphere and the gases trapped in lunar surface material provide the main evidence from which the isotopic composition of H, He and Ne in the Protosolar Cloud ...
Measurement of the Abundance of Helium-3 in the Sun and in the Local Interstellar Cloud with SWICS on Ulysses
(Kluwer Academic Publishers; Springer Science+Business Media, 1998-04)
The abundance of 3He in the present day local interstellar cloud (LIC) and in the sun has important implications for the study of galactic evolution and for estimating the production of light nuclei in the early universe. ...
Interstellar and Inner Source Pickup Ions Observed with Swics on Ulysses
(Kluwer Academic Publishers; Springer Science+Business Media, 1998-03)
Many species of pickup ions, both of interstellar origin and from an inner, distributed source have been discovered using data from the Solar Wind Ion Composition Spectrometer (SWICS) on Ulysses. Velocity distribution ...
Photochemistry of planetary ionospheres
(Elsevier, 1987)
The basic photochemical processes in the upper atmospheres and ionospheres of the various bodies in our solar system (planets, moons and comets) are similar. However, there are many different factors (e.g. gas composition, ...
The comet Halley dust and gas environment
(Kluwer Academic Publishers; D. Reidel Publishing Company ; Springer Science+Business Media, 1986-02)
Quantitative descriptions of environments near the nucleus of comet P /Halley have been developed to support spacecraft and mission design for the flyby encounters in March, 1986. To summarize these models as they exist ...
Modelling of time-dependention outflows at high geomagnetic latitudes
(Elsevier, 1988)
In a recent paper, Gombosi and Killeen (1987) applied a highly parameterized thermospheric Joule heat source as a boundary condition in the time-dependent, ion outflow model of Gombosi et al. (1985) to show that episodic ...
Trajectory sensitivity to rawinsonde data resolution
(Elsevier, 1988)
Meteorological measurements collected during the Cross Appalachian Tracer Experiment (CAPTEX) were used to evaluate the sensitivity of trajectory calculations to variations in the spatial and temporal density of rawinsonde ...
Ultraviolet spectrometer experiment for the Voyager mission
(Kluwer Academic Publishers; D. Reidel Publishing Company ; Springer Science+Business Media, 1977-11)
The Voyager Ultraviolet Spectrometer (UVS) is an objective grating spectrometer covering the wavelength range of 500–1700 Å with 10 Å resolution. Its primary goal is the determination of the composition and structure of ...