Volume 35 Issue 4
Jul.  2015
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LIN Dong, WANG Chi, LI Wenya, TANG Binbin. Determination of the Kelvin-Helmholtz Wave Parameters on the Magnetopause in Single-spacecraft Observations[J]. Journal of Space Science, 2015, 35(4): 403-408. doi: 10.11728/cjss2014.04.403
Citation: LIN Dong, WANG Chi, LI Wenya, TANG Binbin. Determination of the Kelvin-Helmholtz Wave Parameters on the Magnetopause in Single-spacecraft Observations[J]. Journal of Space Science, 2015, 35(4): 403-408. doi: 10.11728/cjss2014.04.403

Determination of the Kelvin-Helmholtz Wave Parameters on the Magnetopause in Single-spacecraft Observations

doi: 10.11728/cjss2014.04.403
  • Received Date: 2014-04-04
  • Rev Recd Date: 2014-08-20
  • Publish Date: 2015-07-15
  • Kelvin-Helmholtz (K-H) waves are formed from the triggeringof the K-H instability on the magnetopause, which is a candidatemechanism for solar wind entry into the magnetosphere, especially undernorthward interplanetary magnetic field conditions. In this study, aK-H wave event was identified from the observation of probe Bof the Time History of Events and Macroscale Interactions during Substorms (THEMIS) mission on 15 May 2008. A new method to determinethe wave parameters of the K-H waves in single-spacecraft observationsis proposed. The dominant wave period is determined by three kinds ofspectrograms for three key parameters, namely the ion density, the iontemperature, and the z component of magnetic field. The phasevelocity is estimated by calculating the center-of-mass velocity of thedetected K-H vortex region. This approximation is validated bycomparison with other alternative methods. The method to determine thewave parameters is a first step to further study K-H wave properties and their relationship with interplanetaryconditions.

     

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