You can find the most recent solutions here: https://seafile.cloud.uni-hannover.de/d/b63a279079c64024ba1e/ Unconstrained GRACE Follow-On monthly gravity field solutions from...

Unconstrained GRACE monthly gravity field solutions from K-band range-rates and reduced-dynamic orbits. Processing details can be found in the following article: Koch I., Flury...

General Introduction: GRACE Follow-On GRACE (Gravity Recovery And Climate Experiment) Follow On is a gravity-measuring satellite pair orbiting Earth in a low-Earth orbit....