Revision of the high-degree Gauss coefficients in the IGRF 1945-1955 models by using natural orthogonal components analysis
-
- Xu Wen-Yao
- Institute of Geology and Geophysics, Chinese Academy of Sciences
書誌事項
- タイトル別名
-
- Revision of the high-degree Gauss coefficients in the IGRF 1945-1955 models by using natural orthogonal component analysis
この論文をさがす
抄録
The high-degree Gauss coefficients (n ≥ 7) in the IGRF models for 1945-1955 exhibit some unusual and unreliable behaviors in comparison with the models for other epochs. In this paper the method of Natural Orthogonal Components (NOC) is used to revise these coefficients. The obtained result shows that the main eomagnetic field can be approximated very well by the first a few NOC eigen modes. The high-degree Gauss coefficients (n ≥ 7) are deduced for each of IGRF models using the first 6 eigen modes and low-degree Gauss coefficients (n ≤ 6). The deduced high-degree coefficients are in very good agreement with the original ones for all models except those for 1945, 1950 and 1955. In comparison with the unusual behaviors in the IGRF1945-1955 models, the deduced high-degree coefficients for these models exhibit fairly smooth time-variations. Besides, the magnetic energy and magnetic flux calculated by the revised Gauss coefficients show more continuous secular variations and consistent characteristics.
収録刊行物
-
- Earth, Planets and Space
-
Earth, Planets and Space 54 (7), 753-761, 2002
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
- Tweet
詳細情報 詳細情報について
-
- CRID
- 1390282681489174784
-
- NII論文ID
- 10009487003
- 130003780920
-
- NII書誌ID
- AA11211921
-
- ISSN
- 18805981
- 13438832
-
- NDL書誌ID
- 6449808
-
- 本文言語コード
- en
-
- データソース種別
-
- JaLC
- NDL
- Crossref
- CiNii Articles
-
- 抄録ライセンスフラグ
- 使用不可