Different Response of O-mode and X-mode to Travelling Ionospheric Disturbances: Observations and Simulations

This dataset includes plotting codes, observational data from ionosondes and GNSS reciever, as well as the simulated ionograms data from ray tracing method. It is used to investigate the TIDs' effects on ionograms, such as figuring out how the U-shaped structure formed and exploring potential factors driving the difference in response of O-mode and X-mode.