Global vector and scalar Magsat magnetic anomaly maps
Global vector and scalar Magsat magnetic anomaly maps
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DOI：
10.1029/95jb01237
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发表时间：
1995-10
影响因子：
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通讯作者：
D. Ravat;R. Langel;M. Purucker;J. Arkani‐Hamed;D. Alsdorf
中科院分区：
文献类型：
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作者：
D. Ravat;R. Langel;M. Purucker;J. Arkani‐Hamed;D. Alsdorf
利用Magsat数据模拟电离层场的经验和分析技术已经开发出来，有助于从未校正的异常中去除电离层场，从而更好地估计区域岩石圈异常。赤道分量ΔX、ΔZ和ΔB以及极地分量ΔZ和ΔB的测量任务已经完成。电离层场模拟技术已被整合到一个处理序列中，该序列包含了过去十年中发展起来的一些重要数据处理技术。数据处理技术包括在相邻通道的相关分析中保留公共信号；黎明和黄昏数据在轨道交点处的场差分析；协变球谐分析过程中公共信号的保留。结果表明，上述处理方案的实施可以映射出岩石圈最强大的磁异常（矢量分量和标量分量）。
Empirical and analytical techniques for modeling ionospheric fields in Magsat data have been developed that facilitate ionospheric field removal from uncorrected anomalies to obtain better estimates of regional lithospheric anomalies. This task has been accomplished for equatorial ΔX, ΔZ, and ΔB component and polar ΔZ and ΔB component measurements. The techniques for modeling ionospheric fields have been integrated into a processing sequence that incorporates some of the important data-processing techniques developed during the last decade. Data-processing techniques include retention of common signal in a correlation analysis of adjacent passes ; analysis of field differences between dawn and dusk data at points where their orbits cross ; and retention of common signal in a covariant spherical harmonic analysis procedure. Results suggest that implementation of the above processing scheme leads to the mapping of the most robust magnetic anomalies of the lithosphere (vector components as well as scalar).