Improving ionospheric predictability requires accurate simulation of the mesospheric polar vortex oleh V. Lynn Harvey, V. Lynn Harvey, Cora E. Randall, Cora E. Randall, Scott M. Bailey, Erich Becker, Jorge L. Chau, Chihoko Y. Cullens, Larisa P. Goncharenko, Larry L. Gordley, Neil P. Hindley, Ruth S. Lieberman, Han-Li Liu, Linda Megner, Scott E. Palo, Nicholas M. Pedatella, David E. Siskind, Fabrizio Sassi, Anne K. Smith, Gunter Stober, Claudia Stolle, Jia Yue, Jia Yue