Methods of measuring wind across a microwave propagation path are examined and specific problems involved are discussed. Both the initial slope and the time-delay method are considered and the use of a filter in the time domain for changing the shape of the weighting functions is examined. An experiment that has been carried out at X-band along a 37 km propagation path over hilly terrain is described. In this experiment emphasis has been given to straightforward procedures for inferring the wind across the path by making use of simple wind models valid for some kind of air circulation. A comparison of the results with data obtained from conventional wind measurements is reported.