WFRF:(Morooka M.)
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The first in situ electron temperature and density measurements of the Martian nightside ionosphere
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- Fowler, C. M. (author)
- Univ Colorado, Lab Atmospher & Space Sci, Boulder, CO 80309 USA.
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- Andersson, L. (author)
- Univ Colorado, Lab Atmospher & Space Sci, Boulder, CO 80309 USA.
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- Ergun, R. E. (author)
- Univ Colorado, Lab Atmospher & Space Sci, Boulder, CO 80309 USA.
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- Univ Colorado, Lab Atmospher & Space Sci, Boulder, CO 80309 USA Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA. (creator_code:org_t)
- 2015
- 2015
- English.
- In: Geophysical Research Letters. - 0094-8276 .- 1944-8007. ; 42:21, s. 8854-8861
- Journal article (peer-reviewed)
Abstract
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- The first in situ nightside electron density and temperature profiles at Mars are presented as functions of altitude and local time (LT) from the Langmuir Probe and Waves (LPW) instrument on board the Mars Atmosphere and Volatile EvolutioN (MAVEN) mission spacecraft. LPW is able to measure densities as low as similar to 100 cm(-3), a factor of up to 10 or greater improvement over previous measurements. Above 200 km, near-vertical density profiles of a few hundred cubic centimeters were observed for almost all nightside LT, with the lowest densities and highest temperatures observed postmidnight. Density peaks of a few thousand cubic centimeters were observed below 200 km at all nightside LT. The lowest temperatures were observed below 180 km and approach the neutral atmospheric temperature. One-dimensional modeling demonstrates that precipitating electrons were able to sustain the observed nightside ionospheric densities below 200 km.
Subject headings
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
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- ref (subject category)
- art (subject category)
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- Fowler, C. M.
- Andersson, L.
- Ergun, R. E.
- Morooka, M.
- Delory, G.
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- Lillis, Robert J ...
- McEnulty, T.
- Weber, T. D.
- Chamandy, T. M.
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- Mitchell, D. L.
- Mazelle, C.
- Jakosky, B. M.
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- Uppsala University
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