Mission To Map Earth S Magnetic Field Readies For Takeoff
A trio of European satellites is being readied for launch tomorrow from Russia’s Plesetsk spaceport to study Earth’s magnetic field in unprecedented detail. The $296-million mission, known as Swarm, will map the magnetosphere for at least four years. Mission managers with the European Space Agency (ESA) are awaiting the launch—postponed twice owing to problems with the Russian rocket’s upper stage—with anxiety. In 2009, a Rockot carried two ESA Earth-observation satellites—GOCE (Gravity field and steady-state Ocean Circulation Explorer) and SMOS (Soil Moisture and Ocean Salinity)—safely into orbit....