The session aims at exploring recent advances in all aspects of measurement techniques, options of data processing, storage, visualization and exchange leading to efficient monitoring, nowcasting and forecasting ionospheric parameters important for communication, navigation, and positioning systems. We invite authors to present results demonstrating novel techniques based on radio sensing methods, radar measurements, optical methods, and in situ measurements, and how the use of these results contributes to advanced empirical assimilative and ensemble modeling techniques. Results presented in this session should target the improvement of our ability to specify and predict ionospheric large scale disturbances, travelling ionospheric disturbances, and scintillations towards a comprehensive space weather monitoring and warning system.