1-dimensional upward continuation of the ground magnetic field disturbance using spherical elementary current systems
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- Vanhamäki Heikki
- Finnish Meteorological Institute, Geophysical Research Division
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- Amm Olaf
- Finnish Meteorological Institute, Geophysical Research Division
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- Viljanen Ari
- Finnish Meteorological Institute, Geophysical Research Division
書誌事項
- タイトル別名
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- One-dimensional upward continuation of the ground magnetic field disturbance using spherical elementary current systems
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抄録
Ionospheric equivalent currents are defined as spherical sheet currents, which reproduce the observed magnetic disturbances below the ionosphere. One way of determining these currents is to place several so called spherical elementary current systems (SECS) in the ionospheric height and to solve an inversion problem for the amplitudes of these systems. In previous studies this method has been applied to two-dimensional data sets, having both latitudinal and longitudinal spatial coverage (2D SECS method). In this paper a one-dimensional variant of this method (1D SECS) is developed. The 1D SECS method can be used even in those situations where the data set is one dimensional, e.g. with one meridionally aligned magnetometer chain. The applicability of the 1D SECS method is tested using both synthetic and real data. It is found that in real situations the errors in the 1D SECS results are 5-10% in current density profiles and -5% in integrated currents, when compared to the results of the more accurate 2D SECS method.
収録刊行物
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- Earth, Planets and Space
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Earth, Planets and Space 55 (10), 613-625, 2003
地球電磁気・地球惑星圏学会 、公益社団法人 日本地震学会、特定非営利活動法人 日本火山学会、日本測地学会、日本惑星科学会
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詳細情報 詳細情報について
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- CRID
- 1390282681489041536
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- NII論文ID
- 10011943707
- 130003780941
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- NII書誌ID
- AA11211921
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- ISSN
- 18805981
- 13438832
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- NDL書誌ID
- 6794633
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
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