Was launched in 1997 by the united states . it is capable of measuring the composition of charged particle from the sun and the interplanetary magnetic field . it gives us important information on the materials released during solar events 于一九九七年由美国发射，它能分析从太阳释放出来带电荷粒子的物质组合及行星间的磁场，为我们提供太阳活动事件中释出物质的重要资料。
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Was launched in 1997 by the united states . it is capable of measuring the composition of charged particle from the sun and the interplanetary magnetic field . it gives us important information on the materials released during solar events 于一九九七年由美国发射，它能分析从太阳释放出来带电荷粒子的物质组合及行星间的磁场，为我们提供太阳活动事件中释出物质的重要资料。
