System and method of assisted or automated grain unload synchronization

A combine harvester comprising:

• an operator cabin;
• a crop processor for separating grain from material other than grain;
• a grain tank for collecting grain;
• an unloading conveyor for transferring grain out of the grain tank;
• an electromagnetic detecting and ranging module positioned on top of the operator cabin for detecting a fill level of the grain tank and the location of a receiving vehicle relative to the combine harvester;
• and
• one or more computing devices for—
• receiving data from the electromagnetic detecting and ranging module, the data indicating the fill level of the grain tank and the location of the receiving vehicle relative to the combine harvester, and
• generating automated navigation data based on the data received from the electromagnetic detecting and ranging module, the automated navigation data to automatically control operation of at least one of the combine harvester and the receiving vehicle to align the unloading conveyor with the grain bin of the receiving vehicle.