Derivation of a geomagnetic model to n=63
Derivation of a geomagnetic model to n=63
复制标题
推导出 n=63 的地磁模型
DOI：
10.1111/j.1365-246x.1989.tb00513.x
复制
发表时间：
1989
影响因子：
2.8
通讯作者：
D. Schmitz
中科院分区：
文献类型：
--
作者：
J. Cain;Zhigang Wang;C. Kluth;D. Schmitz
发明内容 使用积分技术导出地磁场的高级模型，以将系数扩展到最小二乘法允许的限制之外。先前导出的 n = 29 模型首先使用 1979 年 9 月至 1980 年 6 月期间的新长期变化数据以及先前获得的 Magsat 矢量数据分析集进行更新。然后通过求解电离层-磁层变化并消除其影响来分析新选择的观测矢量 Magsat 数据的残差。然后，将减少的 B 分量在大约 3” X 3” 的纬度和经度块上进行平均，并使用诺依曼方法导出系数。这些系数与最小二乘解的系数相结合，显示出地磁场结构的更多细节，对于 n = 50 来说似乎是真实的。
SUMMARY A high degree model of the geomagnetic fielc is derived using an integral technique to extend coefficients beyond the limits allowable with least squares approaches. A previously derived model to n = 29 was first updated with new secular change data for the interval 1979 September-1980 June combined with the previously obtained analysis set of Magsat vector data. Residuals of a new selection of observed vector Magsat data were then analysed by solving for ionospheric-magnetospheric variations and removing their effect. The reduced B, components were then averaged over approximately 3” X 3” blocks of latitude and longitude, and coefficients derived using the Neumann method. These coefficients, when combined with those from the least squares solution, were seen to show significantly greater detail in the structure of the geomagnetic field which appeared to be realistic to n = 50.