EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Determining the global coherence of plasmaspheric hiss waves in the magnetosphere

Shuai Zhang1,2, Jonathan Rae2, Clare Watt3, Alexander Degeling1, Anmin Tian1, and Quanqi Shi1
Shuai Zhang et al.
  • 1Shandong Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, School of Space Science and Physics, Institute of Space Sciences, Shandong University, Weihai,Shandong, China.
  • 2Mullard Space Science Laboratory, University College London, Dorking, London, UK
  • 3Department of Meteorology, University of Reading, Reading, UK

Plasmaspheric hiss waves is important in the radiation belt. Previous papers have shown that considering the variability of wave parameters will improve the effectiveness of modeling wave-particle interactions in the Radiation Belt, but less is known about how rapidly (and by how much) wave characteristics vary. We use measurements from the Van Allen Probe mission to study the correlation and ratio of wave amplitudes over a range of frequencies covering the plasmaspheric hiss band as a function of separation and time delay between two satellites. A total of 1851 events with small separation (<1RE) were found. The statistical results show that, as separation between spacecraft increase, the characteristics of hiss change in both correlation of the wavepacket and amplitude. Moreover, we find that the coherence between spacecraft is strong at low-L, and decreases strongly with increasing L. We investigate the coherence of plasmaspheric hiss on geomagnetic indices and solar wind driving. We discuss the ramifications of our results with relevance to understanding the global characteristics of plasmaspheric hiss waves.

How to cite: Zhang, S., Rae, J., Watt, C., Degeling, A., Tian, A., and Shi, Q.: Determining the global coherence of plasmaspheric hiss waves in the magnetosphere, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-18504,, 2020


Display file