Flux Transfer Events observations on both side of Magnetopause: from Magnetosphere to Magnetosheath

The successful project Cluster makes it capable to make spatial-temporal studies on space structures. In year 2003 and 2006, the distance between spacecrafts are adjusted to the order of 10000 km, which is larger than the typical thickness of Magnetopause. This gives us the best opportunity to observe FTEs on both side of Magnetopause, respectively and simultaneously. Within this study, we found five events that Cluster observed FTEs on both side of magnetopause and found some differences as follows: 1. The orientations are always obviousely different, sometimes with great angle between them; 2. The 3-D velocity distribution varies between spacecrafts, maybe corresponding to the difference of orientation; 3. The velocity of Magnetosphere FTEs are basically smaller than Magnetosheath ones. Also, with observations from 4 spacecrafts in different locations, we roughly figured out the configuration near the Magnetopause.