globalchange  > 气候减缓与适应
DOI: 10.1002/2017JA024619
Scopus记录号: 2-s2.0-85044210088
论文题名:
Determining L-M-N Current Sheet Coordinates at the Magnetopause From Magnetospheric Multiscale Data
作者: Denton R.E.; Sonnerup B.U.Ö.; Russell C.T.; Hasegawa H.; Phan T.-D.; Strangeway R.J.; Giles B.L.; Ergun R.E.; Lindqvist P.-A.; Torbert R.B.; Burch J.L.; Vines S.K.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期:3
起始页码: 2274
结束页码: 2295
语种: 英语
英文关键词: LMN coordinate system ; magnetic reconnection ; magnetopause ; magnetospheric multiscale mission ; MMS ; multispacecraft methods
英文摘要: We discuss methods to determine L-M-N coordinate systems for current sheet crossings observed by the Magnetospheric Multiscale (MMS) spacecraft mission during ongoing reconnection, where eL is the direction of the reconnecting component of the magnetic field, B, and eN is normal to the magnetopause. We present and test a new hybrid method, with eL estimated as the maximum variance direction of B (MVAB) and eN as the direction of maximum directional derivative of B, and then adjust these directions to be perpendicular. In the best case, only small adjustment is needed. Results from this method, applied to an MMS crossing of the dayside magnetopause at 1305:45 UT on 16 October 2015, are discussed and compared with those from other methods for which eN is obtained by other means. Each of the other evaluations can be combined with eL from MVAB in a generalized hybrid approach to provide an L-M-N system. The quality of the results is judged by eigenvalue ratios, constancy of directions using different data segments and methods, and expected sign and magnitude of the normal component of B. For this event, the hybrid method appears to produce eN accurate to within less than 10°. We discuss variance analysis using the electric current density, J, or the J × B force, which yield promising results, and minimum Faraday residue analysis and MVAB alone, which can be useful for other events. We also briefly discuss results from our hybrid method and MVAB alone for a few other MMS reconnection events. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114355
Appears in Collections:气候减缓与适应

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作者单位: Department of Physics and Astronomy, Dartmouth College, Hanover, NH, United States; Thayer School of Engineering, Dartmouth College, Hanover, NH, United States; Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA, United States; Institute of Space and Astronautical Science, JAXA, Sagamihara, Japan; Space Science Laboratory, University of California, Berkeley, CA, United States; NASA Goddard Space Flight Center, Greenbelt, MD, United States; Laboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder, CO, United States; Space and Plasma Physics, Royal Institute of Technology, Stockholm, Sweden; Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, NH, United States; Space Science and Engineering Division, Southwest Research Institute, San Antonio, TX, United States; Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, TX, United States; Applied Physics Laboratory, Johns Hopkins University, Laurel, MD, United States

Recommended Citation:
Denton R.E.,Sonnerup B.U.Ö.,Russell C.T.,et al. Determining L-M-N Current Sheet Coordinates at the Magnetopause From Magnetospheric Multiscale Data[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(3)
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