Jean‐Loup Bertaux, J. É. Blamont,
... Ogo 5 Lyman alpha measurements in the upper geocorona J. L. Bertaux, J. L. BertauxSearch for more ... on board the Ogo 5 spacecraft outside the geocorona. The Lyman α emission originating from hydrogen atoms in the upper part of the geocorona was derived from the total measured intensity after ... Lyman alpha scattering in the earth's hydrogen geocorona, J. Geophys. Res., 68, 2639, 1963. Thomas, G. ... alpha measurements of neutral hydrogen in the outer geocorona and in the interplanetary space, J. Geophys. Res., ...
Tópico(s): Scientific Research and Discoveries
1973 - American Geophysical Union | Journal of Geophysical Research Atmospheres
... ster in a broad line originating outside the geocorona and 1.5 × 10−3 erg/cm2 sec ... of the theory of radiative transfer in a geocorona of optical thickness 2.3 and proper attention ... result is that the model of a hydrogen geocorona containing 3 × 1012 atoms/cm2 in the daytime ...
Tópico(s): Calibration and Measurement Techniques
1964 - American Geophysical Union | Journal of Geophysical Research Atmospheres
... radiation from helium atoms and ions in the geocorona R. R. Meier, R. R. MeierSearch for more ... A and He+ 304-A radiation from the geocorona, assuming resonance scattering of solar radiation. Comparison of ... Lyman α scattering in the earth's hydrogen geocorona, 1, J. Geophys. Res., 68, 2639, 1963. Thomas, ...
Tópico(s): Astro and Planetary Science
1972 - American Geophysical Union | Journal of Geophysical Research Atmospheres
Jochen Zoennchen, Justin J. Bailey, U. Nass, M. Gruntman, H. J. Fahr, J. Goldstein,
... radiation, observed as the glow of the H-geocorona. The Two Wide-angle Imaging Neutral-atom Spectrometers ( ... September 2008 to create a time averaged hydrogen geocorona model representative for these solar minimum conditions. In this averaged model we assume that the H-geocorona is longitudinally symmetric with respect to the earth- ... to-night side H-density asymmetry. The H-geocorona presented here should serve as a reference H- ...
Tópico(s): Solar and Space Plasma Dynamics
2011 - Copernicus Publications | Annales Geophysicae
Brian Flynn, John V. Vallerga, F. Dalaudier, G. R. Gladstone,
... interplanetary signal through resonance scattering by the He geocorona occurs. We believe this to be the first ... the local interstellar He wind emissions by the geocorona. We find that the geocoronal extinction signatures provide ... He parameters and the morphology of the He geocorona. On the basis of model fits of the ...
Tópico(s): Atmospheric Ozone and Climate
1998 - American Geophysical Union | Journal of Geophysical Research Atmospheres
G. R. Carruthers, Thornton Page, R. R. Meier,
Lyman α imagery of the hydrogen geocorona was obtained from the lunar surface during the Apollo 16 mission. The images are of 20° diameter fields, with 2 arc min ... the earth. The data confirm that the hydrogen geocorona is detectable above the interplanetary Lyman α background ...
Tópico(s): Space exploration and regulation
1976 - American Geophysical Union | Journal of Geophysical Research Atmospheres
V. I. Shematovich, Д. В. Бисикало, Jean‐Claude Gérard,
... contribute to the population of the hot oxygen geocorona. It is also found that only atmospheric sputtering ... populate the external regions of the hot oxygen geocorona. The results of calculations are in a good ...
Tópico(s): Atmospheric Ozone and Climate
2006 - American Geophysical Union | Journal of Geophysical Research Atmospheres
Daniel M. Cotton, G. R. Gladstone, S. Chakrabarti,
... above the exobase and a hot atomic oxygen geocorona. In particular, the effects of non‐LTE on ... using a standard LTE model. A hot O geocorona having a peak density of 10 6 cm − ...
Tópico(s): Astro and Planetary Science
1993 - American Geophysical Union | Journal of Geophysical Research Atmospheres
Stefan Werner, H. U. Keller, A. Korth, H. Lauche,
... scattered by the neutral hydrogen atoms of the geocorona. These data provide information about the hydrogen column ... providing hydrogen densities of the Earth’s exosphere/geocorona. We found that the models overestimate the decrease ...
Tópico(s): Solar and Space Plasma Dynamics
2004 - Elsevier BV | Advances in Space Research
Igor Baliukin, Jean‐Loup Bertaux, Éric Quémerais, V. Izmodenov, W. Schmidt,
... assign the absorbed signal almost entirely to the geocorona. The geocorona was found to extend at least up to ...
Tópico(s): Ionosphere and magnetosphere dynamics
2019 - Wiley | Journal of Geophysical Research Space Physics
... by the earth's extensive hydrogen envelope (the ‘geocorona’) is considered in detail. The equations of radiation ...
Tópico(s): Atmospheric Ozone and Climate
1963 - American Geophysical Union | Journal of Geophysical Research Atmospheres
... ß, if the nocturnal hydrogen content of the geocorona is of an optical thickness large enough to ... a geocoma or by multiple scattering in the geocorona. The variation needed is much larger for the ...
Tópico(s): Atmospheric Ozone and Climate
1964 - Elsevier BV | Planetary and Space Science
John C. Brandt, Joseph W. Chamberlain,
... hypothesis that the radiation might originate in a geocorona (extended outer atmosphere of the earth). The radiative- ... sky radiation if the latter originated in a geocorona. But if, as seems to he the case, ...
Tópico(s): Impact of Light on Environment and Health
1959 - IOP Publishing | The Astrophysical Journal
... emission arising from Lyman-α scattering in the geocorona have been normalized to remove the effects of ... column abundance and distribution of hydrogen in the geocorona, variations in the intensity of the line center ...
Tópico(s): Astrophysics and Cosmic Phenomena
1968 - American Geophysical Union | Journal of Geophysical Research Atmospheres
E. C. Bruner, Robert W. Parker,
... flux available for scattering by hydrogen in the geocorona was 2.8 × 1011 photons/cm² sec. The ...
Tópico(s): Stellar, planetary, and galactic studies
1969 - American Geophysical Union | Journal of Geophysical Research Atmospheres
... solved for several theoretical models of the hydrogen geocorona. Comparisons of the computed intensities with the experimental ...
Tópico(s): Astronomical Observations and Instrumentation
1969 - American Geophysical Union | Journal of Geophysical Research Atmospheres
... elliptical orbit provided measurements of both the outer geocorona and of the 1216-A sky background emission, ...
Tópico(s): Ionosphere and magnetosphere dynamics
1972 - American Geophysical Union | Journal of Geophysical Research Atmospheres
W. C. Feldman, J. R. Asbridge, S. J. Bame, P. D. Kearney,
... Lyman α observations: Evidence for an aspherical hydrogen geocorona at 18 RE, J. Geophys. Res., 77, 6665, ... alpha measurements of neutral hydrogen in the outer geocorona and in interplanetary space, J. Geophys. Res., 77, ...
Tópico(s): Ionosphere and magnetosphere dynamics
1974 - American Geophysical Union | Journal of Geophysical Research Atmospheres
R. J. Reynolds, F. L. Roesler, F. Scherb,
... Intensity Balmer Emissions from the Interstellar Medium and Geocorona Reynolds, R. J. ; Roesler, F. L. ; Scherb, F. ...
Tópico(s): Ionosphere and magnetosphere dynamics
1973 - IOP Publishing | The Astrophysical Journal
... 20 earth radii). Additional mechanisms acting upon the geocorona alter the basic evaporative case in notable ways. ... via the Boltzmann equation results in “heating” the geocorona and enhancing the escape flux at the expense ...
Tópico(s): Planetary Science and Exploration
1985 - American Geophysical Union | Journal of Geophysical Research Atmospheres
L. A. Frank, J. D. Craven, R. L. Rairden,
... A series of images of the Earth's geocorona in scattered solar Ly α emissions is used ...
Tópico(s): Geomagnetism and Paleomagnetism Studies
1985 - Elsevier BV | Advances in Space Research
E. C. Roelof, D. G. Mitchell, D. J. Williams,
... trapped ions collide with the exospheric neutral hydrogen geocorona and the energetic ions are neutralized by charge ... and we estimate a corresponding decay time for geocorona H atoms ≃ 9 days at that time and ...
Tópico(s): Atmospheric Ozone and Climate
1985 - American Geophysical Union | Journal of Geophysical Research Atmospheres
V. I. Shematovich, Д. В. Бисикало, Jean‐Claude Gérard,
A model of the hot oxygen geocorona in the transition region near the exobase is described. It is based on a Monte Carlo solution of the nonlinear Boltzmann equation ...
Tópico(s): Solar and Space Plasma Dynamics
1994 - American Geophysical Union | Journal of Geophysical Research Atmospheres
Hiroyo Ohya, K. Shiokawa, Yoshizumi Miyoshi,
... D and lower E regions, effects such as geocorona, GCRs, particle precipitation, and variations in neutral density in the lower thermosphere. Among these processes, the geocorona and particle precipitation could show negative correlation, while ...
Tópico(s): GNSS positioning and interference
2011 - American Geophysical Union | Journal of Geophysical Research Atmospheres
I. P. Robertson, M. R. Collier, T. E. Cravens, Mei‐Ching Fok,
... as seen from an observation point outside the geocorona for average solar wind conditions. The locations of ... seen from an observation point well outside the geocorona were also created. The cusps can clearly be ...
Tópico(s): Astro and Planetary Science
2006 - American Geophysical Union | Journal of Geophysical Research Atmospheres
V. I. Shematovich, Д. В. Бисикало, Jean‐Claude Gérard,
... contributes to the population of the hot oxygen geocorona and to the flux of escaping oxygen atoms. ...
Tópico(s): Atmospheric Ozone and Climate
2005 - American Geophysical Union | Geophysical Research Letters
M. Bzowski, H. J. Fahr, D. Ruciński,
... upper atmosphere and analyze influences on the hydrogen geocorona. We also study the process of relaxation of ... resonance line illumination indicate a breathing of the geocorona under variable interplanetary gas inflows.
Tópico(s): Atmospheric Ozone and Climate
1996 - Elsevier BV | Icarus
Jochen Zoennchen, U. Nass, H. J. Fahr,
... of the resonant emission glow of the H-geocorona from very different orbital positions. Terrestrial exospheric atomic ... 2010 to study seasonal variations in the H-geocorona. Data are combined to produce two datasets containing ( ...
Tópico(s): Ionosphere and magnetosphere dynamics
2013 - Copernicus Publications | Annales Geophysicae
Justin J. Bailey, M. Gruntman,
... alpha (121.567 nm) radiation, observed as the geocorona. We report here observations of an exospheric response to geomagnetic storms obtained using measurements of the geocorona by Lyman‐alpha detectors on the Two Wide‐ ...
Tópico(s): Astro and Planetary Science
2013 - American Geophysical Union | Geophysical Research Letters
Д. В. Бисикало, V. I. Shematovich, Jean‐Claude Gérard,
A model of the oxygen geocorona near the exobase solving the nonlinear Boltzmann equation with a Monte Carlo method is used to calculate the distribution of the ...
Tópico(s): Atmospheric Ozone and Climate
1995 - American Geophysical Union | Journal of Geophysical Research Atmospheres