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Plasma Density Esti...
Plasma Density Estimates From Spacecraft Potential Using MMS Observations in the Dayside Magnetosphere
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- Andriopoulou, Maria (author)
- Austrian Acad Sci, Space Res Inst, Graz, Austria.
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- Nakamura, Rumi (author)
- Austrian Acad Sci, Space Res Inst, Graz, Austria.
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- Wellenzohn, Simon (author)
- Karl Franzens Univ Graz, Inst Geophys Astrophys & Meteorol, Graz, Austria.
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- Torkar, Klaus (author)
- Austrian Acad Sci, Space Res Inst, Graz, Austria.
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- Baumjohann, Wolfgang (author)
- Austrian Acad Sci, Space Res Inst, Graz, Austria.
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- Torbert, R. B. (author)
- Univ New Hampshire, Dept Phys, Durham, NH 03824 USA.;Univ New Hampshire, Ctr Space Sci, Durham, NH 03824 USA.
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- Lindqvist, Per-Arne (author)
- KTH,Rymd- och plasmafysik,KTH Royal Inst Technol, Dept Space & Plasma Phys, Stockholm, Sweden
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- Khotyaintsev, Yuri V. (author)
- Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen
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- Dorelli, John (author)
- NASA, Goddard Space Flight Ctr, Greenbelt, MD USA.
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- Burch, James L. (author)
- Southwest Res Inst, San Antonio, TX USA.
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Austrian Acad Sci, Space Res Inst, Graz, Austria Karl Franzens Univ Graz, Inst Geophys Astrophys & Meteorol, Graz, Austria. (creator_code:org_t)
- AMER GEOPHYSICAL UNION, 2018
- 2018
- English.
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In: Journal of Geophysical Research - Space Physics. - : AMER GEOPHYSICAL UNION. - 2169-9380 .- 2169-9402. ; 123:4, s. 2620-2629
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
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- Using spacecraft potential observations with and without active spacecraft potential control (on/off) from the Magnetospheric Multiscale (MMS) mission, we estimate the average photoelectron emission as well as derive the plasma density information from spacecraft potential variations and active spacecraft potential control ion current. Such estimates are of particular importance especially during periods when the plasma instruments are not in operation and also when electron density observations with higher time resolution than the ones available from particle detectors are necessary. We compare the average photoelectron emission of different spacecraft and discuss their differences. We examine several time intervals when we performed our density estimations in order to understand the strengths and weaknesses of our data set. We finally compare our derived density estimates with the plasma density observations provided by plasma detectors onboard MMS, whenever available, and discuss the overall results. The estimated electron densities should only be used as a proxy of the electron density, complimentary to the plasma moments derived by plasma detectors, especially when the latter are turned off or when higher time resolution observations are required. While the derived data set can often provide valuable information about the plasma environment, the actual values may often be very far from the actual plasma density values and should therefore be used with caution.
Subject headings
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geofysik (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geophysics (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Andriopoulou, Ma ...
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Nakamura, Rumi
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Wellenzohn, Simo ...
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Torkar, Klaus
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Baumjohann, Wolf ...
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Torbert, R. B.
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Lindqvist, Per-A ...
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Khotyaintsev, Yu ...
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Dorelli, John
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Burch, James L.
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Fusion Plasma an ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Geophysics
- Articles in the publication
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Journal of Geoph ...
- By the university
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Royal Institute of Technology
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Uppsala University