Thermal Escape of Neutral Hydrogen and Its Distribution in the Earth's Thermosphere |
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1000 ALTITUDE km 2.0 HORIZONTAL VELOCITY 2.0 VERTICAL VELOCITY angular distribution anisotropy assumed atmospheric escape Boltzmann equation collision computations concentration versus altitude critical region dashed curve diffusion velocities diffusive equilibrium DISTRIBUTION AT 590 DISTRIBUTION AT 885 distribution of hydrogen EARTH'S THERMOSPHERE effect of escape EFFECTIVE TEMPERATURE equilibrium distribution escape level ESCAPE OF NEUTRAL escape problem escape velocity exospheric base finite number Geophys helium HORIZONTAL VELOCITY DISTRIBUTION hydrogen atom hydrogen concentration versus Liwshitz Goddard Space lower boundary Markov Chains Maxwellian at 1500°K mean free path Monte Carlo method NEUTRAL HYDROGEN number of particles Number of Source obtained Planetary Atmospheres random Reference 14 RELATIVE CONCENTRATION S. F. Singer University sample scalar velocity scale height Selected Layers Source Particles Space Sci stationary conditions statistical weight THERMAL ESCAPE THERMOSPHERE by Mordehai tion transition region University of Miami upper boundary VELOCITY 1 unit velocity for 2500 velocity range VERTICAL VELOCITY DISTRIBUTION zenith angle