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首页> 外文期刊>Earth, planets and space: EPS >The IZMIRAN main magnetic field candidate model for IGRF-10, produced by a spherical harmonic-natural orthogonal component method
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The IZMIRAN main magnetic field candidate model for IGRF-10, produced by a spherical harmonic-natural orthogonal component method

机译：通过球谐自然正交分量法生成的IGRF-10的IZMIRAN主磁场候选模型

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摘要

A simple method is proposed for constructing a space-time model of the main magnetic field based on the high-accuracy satellite survey data. At the first stage, we expand the CHAMP daily mean data into spherical harmonics with constant coefficients. It provides us with a series of the daily mean spherical-harmonic models (DMM) over a survey interval of several years, which are, then, expanded into the natural orthogonal components (NOC). It is shown that the NOC series converges rapidly, and that the accuracy of the space-time model over the time interval under consideration is no worse than the accuracy of the traditional models.
机译：提出了一种基于高精度卫星测量数据构建主磁场时空模型的简单方法。在第一阶段，我们将CHAMP日均值数据扩展为常数系数的球谐函数。它在几年的调查间隔内为我们提供了一系列日平均球谐模型（DMM），然后将其扩展为自然正交分量（NOC）。结果表明，NOC序列收敛迅速，所考虑的时间间隔内时空模型的精度不低于传统模型的精度。

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