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Hot oxygen geocorona as inferred from neutral exospheric models and mass spectrometer measurements
- Source :
- Journal of Geophysical Research. 94:5523
- Publication Year :
- 1989
- Publisher :
- American Geophysical Union (AGU), 1989.
-
Abstract
- Summer hot oxygen densities of 10,000-30,000 per cubic cm at 1100 km (or 100,000-300,000 at 550 km) for low to moderate solar activities are inferred from differences between satellite drag and mass-spectrometer-based models. At high solar activities, densities at 925 km from 100,000-400,000 (or 5 x 10 to the 5th to 2 x 10 to the 6th at 550 km) are inferred from a limited number of Dynamics Explorer mass spectrometer measurements. The densities are of the same order as those reported previously from ground-based optical measurements. It is pointed out that a detailed theoretical calculation of the hot oxygen distribution consistent with the cool populations in mass-spectrometer-based models would provide the basis for a more complete interpretation of mass spectrometer data and of high-altitude differences between drag-based and mass-spectrometer-based models. It is concluded that hot oxygen could be providing the major contribution to satellite drag in the summer lower exosphere during low solar activity.
- Subjects :
- Atmospheric Science
Ecology
Atmospheric models
Airglow
Paleontology
Soil Science
chemistry.chemical_element
Forestry
Aquatic Science
Oceanography
Atmospheric sciences
Geophysics
Atmosphere of Earth
chemistry
Space and Planetary Science
Geochemistry and Petrology
Drag
Earth and Planetary Sciences (miscellaneous)
Environmental science
Satellite
Helium
Earth-Surface Processes
Water Science and Technology
Exosphere
Geocorona
Subjects
Details
- ISSN :
- 01480227
- Volume :
- 94
- Database :
- OpenAIRE
- Journal :
- Journal of Geophysical Research
- Accession number :
- edsair.doi...........861b93cce0f4fffd83e09a5febcef395