In the basic configuration of the microwave landing system, an azimuth station (2) and an elevation station (1) are interconnected by a data link for transferring data and sync signals, and each of the stations includes a monitoring facility (10, 15; 3, 8) for monitoring its signals in the near field. In the novel microwave landing system, the near-field monitoring facility of one of the stations is also used to monitor the signals from the other station in the far-field.