The five satellites that comprise the THEMIS project are set to launch today aboard a single rocket. The five rockets will study the magnetosphere of the earth for clues as to the nature of solar storms that damage satellites and electronic communications on earth. A short intro into the THEMIS project
A short intro into a similar European Space Agency Project

NASA will be launching five satellites to study geomagnetic substorms. The project is title THEMIS or 'Time History of Events and Macroscale Interactions during Substorms'. Sometimes acronyms are very useful. The project will investigate how solar winds interact with the magnetosphere. It sounds very similar to the previous European project reported on earlier at Aceize.