Reconstruction of Local Magnetic Structures by a Modified Radial Basis Function Method

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Reconstruction of Local Magnetic Structures by a Modified Radial Basis Function Method. / Chen, Wenming; Wang, Xiaogang; Tsyganenko, N. A.; Andreeva, V. A.; Semenov, V. S. .

In: Journal of Geophysical Research: Space Physics, Vol. 124, No. 12, 2019, p. 10141 - 10152.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{fb4293024a33474d9ddfa37f0e5d8f31,

title = "Reconstruction of Local Magnetic Structures by a Modified Radial Basis Function Method",

abstract = "Local magnetic structures in space environments, in particular, those in the diffusion region such as magnetic nulls or separators, are very difficult to identify by satellite measurements but important for understanding of magnetic reconnection. Multi-spacecraft missions such as Cluster or MMS, however, provide an opportunity to reconstruct the fine structures using vector data of space magnetometers. In this paper, we introduce a method for such a local reconstruction, based on the modified radial basis functions (Andreeva & Tsyganenko, 2016, ), used previously for the global magnetic field modeling. A principal advantage of this method is its freedom from a priori assumptions on the magnetic field topology. The method has been tested on 2(1)/(2) and 3D reconnection geometries and provided a good agreement with preset models. The relative errors of null positions, gamma-line directions, and n-ary sumation -surface normal directions are found to be below 6% even with 20% random errors added to the target magnetic field vectors in reconstruction of 3D separator model geometry. Applications of the method to the field reconstruction based on Cluster measurements are also presented and discussed.",

keywords = "magnetic null, reconstruction method, separator, NULL, FIELD, RECONNECTION, SPACECRAFT",

author = "Wenming Chen and Xiaogang Wang and Tsyganenko, {N. A.} and Andreeva, {V. A.} and Semenov, {V. S.}",

note = "Chen, W., Wang, X., Tsyganenko, N. A., Andreeva, V. A., & Semenov, V. S. (2019). Reconstruction of local magnetic structures by a modified radial basis function method. Journal of Geophysical Research: Space Physics, 124. https://doi.org/10.1029/2019JA027078",

year = "2019",

doi = "10.1029/2019JA027078",

language = "English",

volume = "124",

pages = "10141 -- 10152",

journal = "Journal of Geophysical Research: Biogeosciences",

issn = "0148-0227",

publisher = "American Geophysical Union",

number = "12",

}

RIS

TY - JOUR

T1 - Reconstruction of Local Magnetic Structures by a Modified Radial Basis Function Method

AU - Chen, Wenming

AU - Wang, Xiaogang

AU - Tsyganenko, N. A.

AU - Andreeva, V. A.

AU - Semenov, V. S.

N1 - Chen, W., Wang, X., Tsyganenko, N. A., Andreeva, V. A., & Semenov, V. S. (2019). Reconstruction of local magnetic structures by a modified radial basis function method. Journal of Geophysical Research: Space Physics, 124. https://doi.org/10.1029/2019JA027078

PY - 2019

Y1 - 2019

N2 - Local magnetic structures in space environments, in particular, those in the diffusion region such as magnetic nulls or separators, are very difficult to identify by satellite measurements but important for understanding of magnetic reconnection. Multi-spacecraft missions such as Cluster or MMS, however, provide an opportunity to reconstruct the fine structures using vector data of space magnetometers. In this paper, we introduce a method for such a local reconstruction, based on the modified radial basis functions (Andreeva & Tsyganenko, 2016, ), used previously for the global magnetic field modeling. A principal advantage of this method is its freedom from a priori assumptions on the magnetic field topology. The method has been tested on 2(1)/(2) and 3D reconnection geometries and provided a good agreement with preset models. The relative errors of null positions, gamma-line directions, and n-ary sumation -surface normal directions are found to be below 6% even with 20% random errors added to the target magnetic field vectors in reconstruction of 3D separator model geometry. Applications of the method to the field reconstruction based on Cluster measurements are also presented and discussed.

AB - Local magnetic structures in space environments, in particular, those in the diffusion region such as magnetic nulls or separators, are very difficult to identify by satellite measurements but important for understanding of magnetic reconnection. Multi-spacecraft missions such as Cluster or MMS, however, provide an opportunity to reconstruct the fine structures using vector data of space magnetometers. In this paper, we introduce a method for such a local reconstruction, based on the modified radial basis functions (Andreeva & Tsyganenko, 2016, ), used previously for the global magnetic field modeling. A principal advantage of this method is its freedom from a priori assumptions on the magnetic field topology. The method has been tested on 2(1)/(2) and 3D reconnection geometries and provided a good agreement with preset models. The relative errors of null positions, gamma-line directions, and n-ary sumation -surface normal directions are found to be below 6% even with 20% random errors added to the target magnetic field vectors in reconstruction of 3D separator model geometry. Applications of the method to the field reconstruction based on Cluster measurements are also presented and discussed.

KW - magnetic null

KW - reconstruction method

KW - separator

KW - NULL

KW - FIELD

KW - RECONNECTION

KW - SPACECRAFT

UR - http://www.scopus.com/inward/record.url?scp=85076362091&partnerID=8YFLogxK

UR - http://www.mendeley.com/research/reconstruction-local-magnetic-structures-modified-radial-basis-function-method

U2 - 10.1029/2019JA027078

DO - 10.1029/2019JA027078

M3 - Article

AN - SCOPUS:85076362091

VL - 124

SP - 10141

EP - 10152

JO - Journal of Geophysical Research: Biogeosciences

JF - Journal of Geophysical Research: Biogeosciences

SN - 0148-0227

IS - 12

ER -

ID: 49854314