Scientific challenges in thermosphere-ionosphere forecasting – conclusions from the October 2014 NASA JPL community workshopAnthony J. Mannucci, Maura E. Hagan, Angelos Vourlidas, Cheryl Y. Huang, Olga P. Verkhoglyadova and Yue DengJ. Space Weather Space Clim., 6 (2016) E01DOI: https://doi.org/10.1051/swsc/2016030