Water vapor estimation using the propagation delay of digital terrestrial broadcasting waves

摘要

The feasibility of measuring water vapor from the propagation delay of digital terrestrial broadcasting waves is under investigation. A real-time delay measurement system with software-defined radio technique is developed. In this paper, experimental results with this system using reflected waves are reported. We have succeeded in observing the propagation delay between the observing point and the reflector from the balance between phases of direct waves and reflected waves. Data obtained with this technique may contribute to improve numerical forecast of localized severe weather phenomena through data assimilations.