We have developed virtual observatory time series on a network of 300 approximately equal area distributed locations, using data from the Swarm, CHAMP, CryoSat-2 and Ørsted satellite missions, processing the data to isolate as best possible the core field signal, and with data error estimates provided, suitable for use in data assimilation experiments.
Below is an example of a composite GVO series covering 2000 to 2020, for the radial field component.
