The GOCE mission is a dedicated gravity field mission. Since the satellite carries three fluxgate magnetometers, these have been calibrated and characterized for pertubations. The standard deviation of geomagnetic quiet time residual with high-performance geomagnetic field model (CHAOS7) is below 13 nT.
A preprint of the detailed study using Analytical method has been published here:
Michaelis, I., Styp-Rekowski, K., Rauberg, J., Stolle, C., & Korte, M. (2022). Geomagnetic data from the GOCE satellite mission. doi:10.1002/essoar.10511006.1
The data has been published here:
Michaelis, Ingo; Korte, Monika (2022): GOCE calibrated and characterised magnetometer data. V. 0205. GFZ Data Services. https://doi.org/10.5880/GFZ.2.3.2022.001
and is available at
ftp://isdcftp.gfz-potsdam.de/platmag/MAGNETIC_FIELD/GOCE/Analytical/v0205/
A preprint of the detailed study using Machine Learning method has been published here:
Kevin Styp-Rekowski, Ingo Michaelis, Claudia Stolle et al. Machine Learning-based Calibration of the GOCE Satellite Platform Magnetometers, 03 May 2022, PREPRINT (Version 1) available at Research Square https://doi.org/10.21203/rs.3.rs-1607576/v1
The data has been published here:
Styp-Rekowski, Kevin; Michaelis, Ingo; Stolle, Claudia; Baerenzung, Julien; Korte, Monika; Kao, Odej (2022): GOCE ML-calibrated magnetic field data. V. 0204. GFZ Data Services. https://doi.org/10.5880/GFZ.2.3.2022.002
and is available at
ftp://isdcftp.gfz-potsdam.de/platmag/MAGNETIC_FIELD/GOCE/ML/v0204/