S. Hatch, S. Haaland, K. M. Laundal, T. M. Jørgensen, L. M. Bjoland, K. Oksavik, J. P. Reistad, and A. Ohma, Hemispheric and seasonal variations in the cold plasma outflow source region: Swarm and CHAMP observations of F-region polar cap electron density, 43rd COSPAR Scientific Assembly, Online, 28 January – 04 February, 2021.