Solar Wind propagates with random fluctuations, leading to turbulence in space. This study was conducted using 4 satellites to plot turbulence in 3D. The four satellites travel in a pyramidal shape at the leading edge of the earth's magnetosphere. It is not clear who or when the study was conducted, but I am guessing the Institute of Geophysics and Extraterrestrial Physics in Germany had something to do with it. The experiment has been ongoing since at least 2002.