globalchange  > 气候减缓与适应
DOI: 10.1002/2017JA025086
Scopus ID: 2-s2.0-85045343794
Title:
Plasma Density Estimates From Spacecraft Potential Using MMS Observations in the Dayside Magnetosphere
Author: Andriopoulou M.; Nakamura R.; Wellenzohn S.; Torkar K.; Baumjohann W.; Torbert R.B.; Lindqvist P.-A.; Khotyaintsev Y.V.; Dorelli J.; Burch J.L.
Source Publication: Journal of Geophysical Research: Space Physics
ISSN: 21699380
Publishing Year: 2018
Volume: 123, Issue:4
pages begin: 2620
pages end: 2629
Language: 英语
English Abstract: 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. ©2018. American Geophysical Union. All Rights Reserved.
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被引频次[WOS]:10   [查看WOS记录]     [查看WOS中相关记录]
Document Type: 期刊论文
Identifier: http://119.78.100.158/handle/2HF3EXSE/114215
Appears in Collections:气候减缓与适应

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Affiliation: Space Research Institute, Austrian Academy of Sciences, Graz, Austria; Institute of Geophysics, Astrophysics and Meteorology, University of Graz, Graz, Austria; Department of Physics and Space Science Center, University of New Hampshire, Durham, NH, United States; Department of Space and Plasma Physics, KTH Royal Institute of TechnologyStockholm, Sweden; Swedish Institute of Space Physics (IRF), Uppsala, Sweden; NASA Goddard Space Flight Center, Greenbelt, MD, United States; Southwest Research Institute, San Antonio, TX, United States

Recommended Citation:
Andriopoulou M.,Nakamura R.,Wellenzohn S.,et al. Plasma Density Estimates From Spacecraft Potential Using MMS Observations in the Dayside Magnetosphere[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(4)
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