Publication at Faculty of Mathematics and Physics |
2010
Abstract
On July 24, 2003, when the Cluster 4 satellite crossed the magnetic equator at about 4.5 RE radial distance on the dusk side (about 15 MLT), whistler wave emissions were observed below the local electron gyrofrequency (fce) in two bands, one band above one‐half the gyrofrequency (0.5fce) and the other band below 0.5fce. A careful analysis of .the wave emissions for this event has shown that Cluster 4 passed through the wave source region.
Simultaneous electron particle data from the PEACE instrument in the generation region indicated the presence of a mid-energy electron population (about 100 s of eV) that had a highly anisotropic temperature distribution with the perpendicular temperature 10 times the parallel temperature.