Hatch, S. M., S. Haaland, K. M. Laundal, T. Moretto, A. W. Yau, L. M. Bjoland, J. P. Reistad, A. Ohma, K. Oksavik, Hemispheric and seasonal variations in the cold plasma outflow source region: Swarm and CHAMP observations of F -region polar cap electron density, COSPAR Meeting, Sydney, Australia, 15-22 August, 2020 (canceled due to corona restrictions)