Scalar magnetic anomaly maps of Earth derived from POGO and Magsat data
Scalar magnetic anomaly maps of Earth derived from POGO and Magsat data
复制标题
根据 POGO 和 Magsat 数据得出的地球标量磁异常图
DOI：
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发表时间：
1994
期刊：
影响因子：
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通讯作者：
M. Purucker
中科院分区：
文献类型：
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作者：
J. Arkani‐Hamed;R. Langel;M. Purucker
提出了一种新的400 km高度的POGO标量磁异常图，该图由15-60度球面谐波组成。根据该地图与两幅新的Magsat黎明和黄昏异常图的共同特征，采用两种不同严格程度的选择标准，绘制了两幅地球标量磁异常图。这些选择标准不同程度地抑制了原始地图的非地壳成分。更严格的选择标准寻求消除尽可能多的污染，以抑制一些异常信号为代价。这张图由15-60度的球面谐波表示。较不严格的选择标准寻求保留尽可能多的地壳信号，代价是也保留一些污染场。这张图由15-65度的球面谐波表示。得到的两幅图高度相关，关联度系数大于0.8。
A new POGO scalar magnetic anomaly map at 400 km altitude is presented which consists of spherical harmonics of degree 15–60. On the basis of the common features of this map with two new Magsat anomaly maps, dawn and dusk, two scalar magnetic anomaly maps of the Earth are presented using two selection criteria with different levels of stringency. These selection criteria suppress the noncrustal components of the original maps by different amounts. The more stringent selection criteria seek to eliminate as much contamination as possible, at the expense of suppressing some anomaly signal. This map is represented by spherical harmonics of degree 15–60. The less stringent selection criteria seek to retain as much crustal signal as possible, at the expense of also retaining some contaminating fields. This map is represented by spherical harmonics of degree 15–65. The resulting two maps are highly correlated with degree correlation coefficients greater than 0.8.