|
Detailed Reference Information |
Nykyri, K., Cargill, P.J., Lucek, E.A., Horbury, T.S., Balogh, A., Lavraud, B., Dandouras, I. and Rème, H. (2003). Ion cyclotron waves in the high altitude cusp: CLUSTER observations at varying spacecraft separations. Geophysical Research Letters 30: doi: 10.1029/2003GL018594. issn: 0094-8276. |
|
We have analysed high-resolution Cluster magnetic field data during three high-altitude cusp crossings in 2001 and 2002. The Cluster separations for these crossings varied between 100 and 600 km and therefore provided an unique opportunity to study wave properties at different length scales. In the cusp Cluster sees frequent intervals of magnetic field fluctuations with clear peaks in power close to the local ion cyclotron frequency, and both left- and right-handed polarisations. At large separations the power seen at different spacecraft can differ by orders of magnitude. For smaller separations, the power seen at the four spacecraft agrees better but still shows some differences. For all separations there was no significant correlation between the signals seen at different spacecraft, indicative of very local structure. The origin of the waves appears to lie in highly filamented sheared plasma flows present in the cusp. |
|
|
|
BACKGROUND DATA FILES |
|
|
Abstract |
|
|
|
|
|
Keywords
Interplanetary Physics, Plasma waves and turbulence, Magnetospheric Physics, Magnetopause, cusp, and boundary layers, Magnetospheric Physics, Plasma waves and instabilities, Space Plasma Physics, Transport processes, Space Plasma Physics, Wave/particle interactions |
|
Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
|
|
|