Fuente: Wipo "precision farming" A system or method for using a Frequency-Modulated Continuous Wave (FMCW) radar system installed on a harvester for determining yield data, the system or method comprising locating the FMCW radar system on the exterior of a clean grain elevator housing in a fixed location such that a signal may be transmitted into the housing. The signal may be guided by a waveguide and reflected off a surface of a load or the one or more components where the distance to the load or the one or more components is related to one or more properties of the load. The FMCW radar system is configured to use the reflected signal to determine the one or more properties of the load.