Computer Science
Scientific paper
Sep 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979p%26ss...27.1163r&link_type=abstract
Planetary and Space Science, vol. 27, Sept. 1979, p. 1163-1173.
Computer Science
4
Elliptical Orbits, Exosphere, Natural Satellites, Particle Size Distribution, Particle Trajectories, Boltzmann Transport Equation, Density Distribution, Distribution Functions, Ion Density (Concentration), Ion Temperature, Lyman Alpha Radiation, Positive Ions, Solar Activity
Scientific paper
A theoretical concept for a rigorous calculation of elliptic particle distributions using Boltzmann equation kinetic approaches is developed. Taking into account realistic gain and loss processes a general procedure for the determination of satellite particle densities for the terrestrial is presented. Representative height profiles are given for the satellite particle density in the exosphere for weak and strong solar activity. The results are compared with those obtained by simplified theoretical approaches; pronounced deviations are seen to be obvious. It is shown that satellite particles are more relevant in low temperature exospheres leading to an order-of-magnitude difference above 1500 km between the densities for weak and strong solar activity. Finally, it is noted that there is a general tendency for satellite particles to become increasingly important with increasing height.
Fahr Hans Jörg
Nass H. U.
Richter E.
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