Hatch, S. M., Haaland, S., Laundal, K. M., Moretto, T., Yau, A. W., Bjoland, L., Reistad, J. P., Ohma, A., and Oksavik, K. (2020), Seasonal and hemispheric asymmetries of F‐region polar cap plasma density: Swarm and CHAMP observations, J. Geophys. Res.: Space Physics, doi.org/10.1029/2020JA028084