Submitting Campus
Daytona Beach
Department
Physical Sciences
Document Type
Article
Publication/Presentation Date
12-20-2003
Abstract/Description
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.
Publication Title
Geophysical Research Letters
DOI
https://doi.org/10.1029/2003GL018594
Publisher
American Geophysical Union
Scholarly Commons Citation
Nykyri, K., Cargill, P. J., Lucek, E. A., Horbury, T. S., Balogh, A., Lavraud, B., Dandouras, I., & rEME, H. (2003). Ion Cyclotron Waves in the High Altitude Cusp: CLUSTER observations at Varying Spacecraft Separations. Geophysical Research Letters, 30(24). https://doi.org/10.1029/2003GL018594
Additional Information
Dr. Nykyri was not affiliated with Embry-Riddle Aeronautical University at the time this paper was published.