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Global empirical models of plasmaspheric hiss using Van Allen Probes

Spasojevic M., Y. Y. Shprits, K. Orlova, (2015), Global empirical models of plasmaspheric hiss using Van Allen Probes, J. of Geophys. Res. [Space Physics], 120, 10,370-10,383, doi:10.1002/2015JA021803

Abstract

Abstract Plasmaspheric hiss is a whistler-mode emission that permeates the Earth's plasmasphere and is a significant driver of energetic electron losses through cyclotron resonant pitch angle scattering. The Electric and Magnetic Field Instrument Suite and Integrated Science instrument on the Van Allen Probes mission provides vastly improved measurements of the hiss wave environment including continuous measurements of the wave magnetic field cross-spectral matrix and enhanced low-frequency coverage. Here, we develop empirical models of hiss wave intensity using two years of Van Allen Probes data. First, we describe the construction of the hiss database. Then, we compare the hiss spectral distribution and integrated wave amplitude obtained from Van Allen Probes to those previously extracted from the Combined Release and Radiation Effects Satellite mission. Next, we develop a cubic regression model of the average hiss magnetic field intensity as a function of Kp, L, magnetic latitude, and magnetic local time. We use the full regression model to explore general trends in the data and use insights from the model to develop a simplified model of wave intensity for straightforward inclusion in quasi-linear diffusion calculations of electron scattering rates.

Authors (sorted by name)

Orlova Shprits Spasojevic

Journal / Conference

Journal Of Geophysical Research (Space Physics)

Acknowledgments

The work at Stanford University was supported under NASA awards NNX14AC04G and NNX15AI94G. Y.Y.S. acknowledges support from NASA awards NNX10AK99G and NNX13AE34G, NSF award AGS‐1243183, UC Lab Fee award 116720, and Horizon 2020 award 637302. All Van Allen Probes data were accessed through the EMFISIS website hosted at the University of Iowa, and we graciously thank the EMFISIS Principal Investigator, Craig Kletzing, and the EMFISIS team. The Kp index was provided by the World Data Center. Other data sets used in this study can be accessed by contacting the first author.

Grants

116720 637302 AGS‐1243183 NNX10AK99G NNX13AE34G NNX14AC04G NNX15AI94G

Bibtex

@article{doi:10.1002/2015JA021803,
author = {Spasojevic, M. and Shprits, Y. Y. and Orlova, K.},
title = {Global empirical models of plasmaspheric hiss using Van Allen Probes},
year={2015},
journal = {Journal of Geophysical Research: Space Physics},
volume = {120},
number = {12},
pages = {10,370-10,383},
keywords = {plasmaspheric hiss, inner magnetosphere, electron scattering, empirical model},
doi = {10.1002/2015JA021803},
url = {https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1002/2015JA021803},
eprint = {https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/2015JA021803},
abstract = {Abstract Plasmaspheric hiss is a whistler-mode emission that permeates the Earth's plasmasphere and is a significant driver of energetic electron losses through cyclotron resonant pitch angle scattering. The Electric and Magnetic Field Instrument Suite and Integrated Science instrument on the Van Allen Probes mission provides vastly improved measurements of the hiss wave environment including continuous measurements of the wave magnetic field cross-spectral matrix and enhanced low-frequency coverage. Here, we develop empirical models of hiss wave intensity using two years of Van Allen Probes data. First, we describe the construction of the hiss database. Then, we compare the hiss spectral distribution and integrated wave amplitude obtained from Van Allen Probes to those previously extracted from the Combined Release and Radiation Effects Satellite mission. Next, we develop a cubic regression model of the average hiss magnetic field intensity as a function of Kp, L, magnetic latitude, and magnetic local time. We use the full regression model to explore general trends in the data and use insights from the model to develop a simplified model of wave intensity for straightforward inclusion in quasi-linear diffusion calculations of electron scattering rates.}
}