ultra relativistic electrons

Greeley, A., Kanekal, S., Sibeck, D., Schiller, Q., & Baker, D. (2020). Evolution of pitch angle distributions of relativistic electrons during geomagnetic storms: Van Allen Probes Observations. Journal Of Geophysical Research: Space Physics, n/a, e2020JA028335. http://doi.org/https://doi.org/10.1029/2020JA028335 (Original work published December 2020)