[1] National Institute of Polar Research,Space Sciences Laboratory
[2] University of California,Dept of Physics and Astronomy
[3] University of Calgary,Dept of Physics and Astronomy
[4] Dartmouth College,School of Physics and Astronomy
[5] University of Minnesota,Department of Electrical and Computer Engineering and Center for Space Physics
[6] SOKENDAI,Department of Physics
[7] Planetary Plasma and Atmospheric Research Center,Physics & Astronomy
[8] Boston University,undefined
[9] Nagoya University,undefined
[10] University of Southampton,undefined