Technical University of Denmark
Download file
Download file
Download file
Download file
Download file
Download file
Download file
Download file
8 files

SOLA Geomagnetic Field estimates

Download all (2.84 MB)
posted on 2022-07-05, 10:23 authored by Magnus Danel Hammer, Christopher Finlay

Description of SOLA data product: 

The SOLA model estimates are expressed in terms of Schmidt semi-normalized spherical harmonics coefficients, in units of nanoTesla, of degree n and order m evaluated at a geocentric radius of 6371.2km. 

Coefficients are provided for the Secular Variation (SV, first time derivate of the field) and the Secular Acceleration (SA, second time derivative of the field). The estimates are given as txt files where the first row provides the different modeled epochs in fraction of years, and the second row provides mean error estimate for modeled epochs. Estimates are provided for two spatial resolutions: 1) SH degree 10 (45deg) and 2) SH degree 8 (50deg), which are the width of the resolution kernels.


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.


European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme grant agreement No. 772561

Dynamics of Earth’s core from multi-satellite observations

European Research Council

Find out more...


ORCID for corresponding depositor

Usage metrics

    DTU Space