SOLA Geomagnetic Field estimates

The SOLA model estimates are expressed in terms of Schmidt semi-normalized spherical harmonics coefficients of degree n and order m evaluated at a geocentric radius of 6371.2km. Reference: Hammer, M.D, Finlay, C.C, and Olsen, N. (2021) Applications for CryoSat-2 satellite magnetic data in studies of the Earth's core field variations. Earth, Planets and Space, 73:73. Hammer,M.D. and Finlay,C.C (2019) Local averages of the core-mantle boundary magnetic field from satellite observations, Geophys. J. Int., 216,1901-1918.

SOLA模型的估计结果以施密特半归一化球谐系数（Schmidt semi-normalized spherical harmonics coefficients）表示，该系数的阶数为n、次数为m，且在6371.2 km的地心半径处计算得到。参考文献：Hammer, M.D、Finlay, C.C与Olsen, N.（2021）《CryoSat-2卫星磁数据在地核磁场变化研究中的应用》，《地球、行星与空间》，73:73。Hammer, M.D与Finlay, C.C（2019）《基于卫星观测的核幔边界磁场局域平均值》，《国际地球物理杂志（Geophys. J. Int.）》，216，1901-1918。