upper limit

Zhang, K., Li, X., Zhao, H., Xiang, Z., Khoo, L., Zhang, W., et al. (2020). Upper Limit of Electron Fluxes Observed in the Radiation Belts. Journal Of Geophysical Research: Space Physics, 126, 2020JA028511. http://doi.org/https://doi.org/10.1029/2020JA028511