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Estimation of radial gradients of phase space density from POLAR observations during a quiet period prior to a sudden solar wind dynamic pressure enhancement

Kim H. -., E. Zesta, K. -. Kim, Y. Shprits, Y. Shi, L. R. Lyons, (2010), Estimation of radial gradients of phase space density from POLAR observations during a quiet period prior to a sudden solar wind dynamic pressure enhancement, J. of Geophys. Res. [Space Physics], 115, doi:10.1029/2010JA015722

Abstract

We have analyzed POLAR electron flux data to estimate the radial gradients of electron phase space density (PSD) immediately prior to a sudden solar wind dynamic pressure enhancement at ∼1135 UT on 12 August 2001. In this event, the instantaneous flux changes from the magnetospheric compression at L ∼ 7.6 in the postmidnight magnetic local time sector are observed to be both energy and pitch angle (PA) dependent: a substantial flux increase for lower energies (

Authors (sorted by name)

Kim Lyons Shi Shprits Zesta

Journal / Conference

Journal Of Geophysical Research (Space Physics)

Acknowledgments

This work was supported by NASA grant NNG04GM98G. We thank R. Lepping and R. Ogilvie for providing WIND solar wind data, D. McComas and C. Smith for providing ACE solar wind data, and J. H. King and N. Papatashvilli for providing GEOTAIL data. We also thank R. Friedel for providing the POLAR CEPPAD data.

Grants

NNG04GM98G

Bibtex

@article{doi:10.1029/2010JA015722,
author = {Kim, H.-J. and Zesta, E. and Kim, K.-C. and Shprits, Y. and Shi, Y. and Lyons, L. R.},
title = {Estimation of radial gradients of phase space density from POLAR observations during a quiet period prior to a sudden solar wind dynamic pressure enhancement},
journal = {Journal of Geophysical Research: Space Physics},
volume = {115},
year ={2010},
number = {A12},
pages = {},
keywords = {radiation belt, phase space density},
doi = {10.1029/2010JA015722},
url = {https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2010JA015722},
eprint = {https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2010JA015722},
abstract = {We have analyzed POLAR electron flux data to estimate the radial gradients of electron phase space density (PSD) immediately prior to a sudden solar wind dynamic pressure enhancement at ∼1135 UT on 12 August 2001. In this event, the instantaneous flux changes from the magnetospheric compression at L ∼ 7.6 in the postmidnight magnetic local time sector are observed to be both energy and pitch angle (PA) dependent: a substantial flux increase for lower energies (}}