Lower-thermosphere-ionosphere (LTI) quantities: current status of measuring techniques and models

Palmroth, M; Grandin, M; Sarris, T; Doornbos, E; Tourgaidis, S; Aikio, A; Buchert, S; Clilverd, MA; Dandouras, I; Heelis, R; Hoffmann, A; Ivchenko, N; Kervalishvili, G; Knudsen, DJ; Kotova, A; Liu, HL; Malaspina, DM; March, G; Marchaudon, A; Marghitu, O; Matsuo, T; Miloch, WJ; Moretto-Jorgensen, T; Mpaloukidis, D; Olsen, N; Papadakis, K; Pfaff, R; Pirnaris, P; Siemes, C; Stolle, C; Suni, J; van den IJssel, J; Verronen, PT; Visser, P; Yamauchi, M