23rd ESA Symposium on European Rocket & Balloon programmes and related research: Moen, J., K. Oksavik, H. C. Carlson, C. Stausland, L. B. N. Clausen, Y. Daabakk, A. Spicher, L. Baddeley, D. A. Lorentzen, Y. Saito, T. A. Bekkeng, J. K. Bekkeng, and T. Abe, Kelvin-Helmholtz and Gradient Drift instabilities in ionosphere cusp flow channels, Visby, Sweden, June 11-15, 2017