latitudinal dependence

Zou, Z., Zuo, P., Ni, B., Wei, F., Zhao, Z., Cao, X., et al. (2019). Wave Normal Angle Distribution of Fast Magnetosonic Waves: A Survey of Van Allen Probes EMFISIS Observations. Journal Of Geophysical Research: Space Physics, 124, 5663-5674. http://doi.org/10.1029/2019JA026556 (Original work published July 2019)