94.20.-y Physics of the ionosphere (for ionospheres of the planets, see 96.35.K; for radiowave propagation, see 41.20.J in electromagnetism, see also 52 Physics of plasmas and electric discharges) ( 0 Dok. )

• 94.20.Bb Wave propagation ( 0 Dok. )
• 94.20.Dd Ionospheric structure (D, E, F, and topside regions) including steady-state ion densities and temperatures ( 0 Dok. )
• 94.20.Ee D region ( 0 Dok. )
• 94.20.Gg E region ( 0 Dok. )
• 94.20.Ji F region ( 0 Dok. )
• 94.20.Kj Polar cap ionosphere ( 0 Dok. )
• 94.20.Lk Topside region ( 0 Dok. )
• 94.20.Mm Plasmasphere ( 0 Dok. )
• 94.20.Pp Plasmapause ( 0 Dok. )
• 94.20.Qq Particle precipitation ( 0 Dok. )
• 94.20.Rr Interactions between waves and particles ( 0 Dok. )
• 94.20.Ss Electric fields ( 0 Dok. )
• 94.20.Tt Ionospheric soundings ( 0 Dok. )
• 94.20.Vv Ionospheric disturbances ( 0 Dok. )
• 94.20.Ww Plasma motion, convection, or circulation ( 0 Dok. )
• 94.20.Yx Interaction between ionosphere and magnetosphere ( 0 Dok. )