Results 1 to 10 of about 244,108 (291)
Meteoric ions in planetary ionospheres [PDF]
Advances in Space Research, 2001 Solar system debris, in the form of meteoroids, impacts every planet. The flux, relative composition and speed of the debris at each planet depends on the planet's size and location in the solar system. Ablation in the atmosphere evaporates the meteoric material and leaves behind metal atoms.
W. Dean Pesnell, J.M. Grebowsky
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Photochemistry of planetary ionospheres [PDF]
Advances in Space Research, 1987 The basic photochemical processes in the upper atmospheres and ionospheresof the various bodiesin our solar system (planets, moons and comets)are similar. However, there are many different factors (e.g. gas composition, energy input, gravity) which control/change the relative importance of these controlling processes.
A. F. Nagy
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Planetary ionospheres – sources and dynamic drivers [PDF]
Proceedings of the International Astronomical Union, 2008 AbstractExternal energy inputs into all planetary upper atmospheres (including more than a half dozen moons with atmospheres) are comprised of combinations of solar EUV, soft x-rays, solar energetic particles, solar wind charged particles, magnetospherically accelerated particles, solar wind electric field, interplanetary dust particles as well as ...
Joseph M. Grebowsky, Arthur C. Aikin
semanticscholar +3 more sources
Planetary Ionospheres and Ionospheric Instabilities
International Astronomy and Astrophysics Research JournalS. J. Gogoi
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Ionospheric Ambipolar Electric Fields of Mars and Venus: Comparisons Between Theoretical Predictions and Direct Observations of the Electric Potential Drop [PDF]
Geophysical Research Letters, 2019 We test the hypothesis that their dominant driver of a planetary ambipolar electric field is the ionospheric electron pressure gradient (∇Pe). The ionospheres of Venus and Mars are mapped using Langmuir probe measurements from NASA's Pioneer Venus ...
Glyn Collinson +7 more
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Planetary waves and vortex structures in the ionosphere [PDF]
Annales Geophysicae, 2009 Abstract. The problem of propagation of large-scale vortices in the ionosphere is investigated. Permanently acting fundamental factors have been discovered making it possible to reveal the mechanisms of generation of large-scale vortices and planetary waves in conductive atmosphere.
A. G. Khantadze +3 more
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Planetary Waves in the Thermosphere-Ionosphere System.
Journal of geomagnetism and geoelectricity, 1996 In the limit of an isothermal atmosphere without dissipation, the equations governing atmospheric motions admit solutions corresponding to “free” (unforced) oscillations for discrete zonal wavenumbers and periods. Global oscillations belonging to the rotational subclass are referred to as free Rossby waves or Rossby normal modes.
J. M. Forbes
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Derivation of a planetary ionospheric storm index [PDF]
Annales Geophysicae, 2008 Abstract. The planetary ionospheric storm index, Wp, is deduced from the numerical global ionospheric GPS-IONEX maps of the vertical total electron content, TEC, for more than half a solar cycle, 1999–2008. The TEC values are extracted from the 600 grid points of the map at latitudes 60° N to 60° S with a step of 5° and longitudes 0° to 345° E with a ...
T. L. Gulyaeva +2 more
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Review of Venusian and Martian ionospheres
地球与行星物理论评, 2021 The launch of Tianwen 1 marks the brand-new stage of the deep space exploration of China, which calls for the foundation of planetary science education in China. In planetary science, the ionosphere is considered to be the region of an atmosphere where a
Yutian Cao +3 more
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What Is the Altitude of Thermal Equilibrium?
Geophysical Research Letters, 2023 Thermal equilibrium in planetary atmospheres occurs at altitudes where the ion, electron, and neutral temperatures are equal. Thermal equilibrium is postulated to occur in the collision‐dominated ionosphere.
W. K. Peterson +5 more
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