The DPS relation

Zhao, H., Li, X., Baker, D., Fennell, J., Blake, J., Larsen, B., et al. (2015). The evolution of ring current ion energy density and energy content during geomagnetic storms based on Van Allen Probes measurements. Journal Of Geophysical Research: Space Physics. http://doi.org/10.1002/2015JA021533 (Original work published August 2015)