Field coefficients for the CHAOS-1969 model in the .mat format

Field coefficients for the CHAOS-1969 model in the .mat format derived for the article "Localized origin at the core-mantle boundary of the 1969 geomagnetic impulse". Please refer to the project "Localized origin at the core-mantle boundary of the 1969 geomagnetic impulse" for further description (link in REFERENCES). Changes in version 2: - Uploaded README file - .mat file contains coefficients for all fields