 the cluster mission has enabled the accurate measurement of the magnetic field along the orbits of its four spacecraft. This has allowed for the study of the three-dimensional aspects of space plasma phenomena on scales comparable to the size of the spacecraft constellation. Additionally, the ability to distinguish temporal and spatial dependencies of small scale processes has been made possible through the use of the four-point measurements. Preliminary in-orbit calibrations have shown that all components of the magnetic field can be measured with an accuracy of approximately 0.1 NT. Data analysis will further refine this accuracy, and several examples of the capabilities of the investigation have already been demonstrated. The data processing flow and the implementation of data distribution to other cluster investigations and to the scientific community in general have also been described. This article was authored by Aballo, CM Carr, MH Acunia, and others.