Updated version of the CHAOS field model
Below are links to the CHAOS-7.15 geomagnetic field model, an updated version of the CHAOS-7 geomagnetic field model (Finlay et al., 2020), using Swarm baseline 0602 data up 8th June 2023 and ground observatory data up to end of May 2022 (based on the BGS AUX_OBS data product version 0136 from May 2023). Model coefficients for the time-dependent internal field are provided in spline coefficient and .shc formats, while the .mat file contains all parts of the model.
Links to software to read and use these files in Python, Matlab and Fortran
CHAOS-7.15_spline-coefficients.dat
Contact: Chris Finlay, cfinlay at space.dtu.dk