Propagation Characteristics of Electrostatic Solitary Waves Obtained Through Multi- Spacecraft Techniques

Details Propagation Characteristics of Electrostatic Solitary Waves Obtained Through Multi- Spacecraft Techniques Propagation Characteristics of Electrostatic Solitary Waves Obtained Through Multi- Spacecraft Techniques

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsm53a1446p&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SM53A-1446

Physics

2700 Magnetospheric Physics (6939), 4455 Nonlinear Waves, Shock Waves, Solitons (0689, 2487, 3280, 3285, 4275, 6934, 7851, 7815 Electrostatic Structures, 7839 Nonlinear Phenomena (4400, 6944), 7852 Solitons And Solitary Waves (4455)

Scientific paper

The Cluster multi-spacecraft fleet is providing new insight into the propagation of Electrostatic Solitary Waves (ESWs) through in situ high time and frequency resolution waveform measurements of the Wideband Data (WBD) plasma wave receiver. ESWs are observed in various regions of Earth's magnetosphere, primarily at boundary crossings and in association with auroral processes (auroral acceleration region and along auroral field lines), and are generated out of the basic physical processes taking place in these regions. Two different types of ESW propagation studies have been carried out using the Cluster WBD multi-spacecraft data. The first involves the direct detection of ESWs that have propagated from one Cluster spacecraft to another, while the second involves the remote detection of striated Auroral Kilometric Radiation (SAKR) as a tracer of ESWs that are propagating in the auroral acceleration region. From these observations we obtain ESW amplitude, propagation speed, size and minimum lifetime. We compare these results to those previously obtained by interferometry methods on single spacecraft and to predictions obtained through simulations. A better understanding of the lifetimes of ESWs, in particular, will help us to better understand the processes taking place in the regions in which the ESWs are generated.

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