Wind speed measurement at distant point - is performed by radio sonde retransmitting signals whose rate of change of phase is measured

摘要

The device uses signals emitted by a radio transmitter. It has one or more radio sondes (12, 14, 16) placed at a distance point for periodic reception and retransmission of signals from the transmitter. There is a receiver for receptiona and processing of the sent back signals. A signal detector connected to the receiver output. The detector measures a vector representing the sent back signal, and a calculator calculates the rate of change of signal phase using integral weighted mean values of the signals. The ratio of change is proportional to the wind speed.