RECOMMENDATION ITU-R P.844-1* - IONOSPHERIC FACTORS AFFECTING FREQUENCY SHARING IN THE VHF ...
1. Terrestrial propagation
    1.1 Introduction
    1.2 Summary of potential ionospheric interference mechanisms
    1.3 Normal F-region propagation
    1.4 Trans-equatorial propagation (TEP)
    1.5 Sporadic-E propagation
    1.6 Meteor-trail ionization
    1.7 Auroral ionization
2. Earth-space propagation