Dr. T. Liu’s research centers on ionospheric disturbances and their impacts on satellite navigation systems. His work spans the observation and modeling of ionospheric irregularities, the investigation of underlying physical mechanisms, and the development of methods to mitigate space weather effects on GNSS performance. His recent studies include characterizing ionospheric gradients during geomagnetic storms, detecting anomalies through eigenvalue analysis, and exploring atmospheric–ionospheric coupling triggered by extreme events such as earthquakes, typhoons, and thunderstorms. Dr. Liu’s broader interests lie in high-precision positioning, GNSS network optimization, and integrated navigation solutions, with a strong emphasis on ensuring the resilience of satellite-based systems under adverse space weather conditions.