Method for determining a quality of at least one mobile radio network

A method for determining a quality of at least one mobile communications network in an air corridor that is safe for autonomous operation of unmanned aerial vehicles, which method comprises:

• providing an unmanned aerial vehicle comprising a mobile communications receiver configured to determine the quality of the at least one mobile communications network, and comprising a positioning device configured to determine a position of the unmanned aerial vehicle in the air corridor,
• defining a linear path in the air corridor:
• arranging a plurality of radio-based control devices configured to control the unmanned aerial vehicle, wherein the plurality of radio-based control devices are spaced apart from one another on a ground, such that the unmanned aerial vehicle when flying the linear path at no position is farther than in visual contact range from at least one of the control devices;
• with a plurality of pilots, flying the unmanned aerial vehicle along the linear path by controlling the unmanned aerial vehicle by means of the plurality of control devices in turn, wherein the individual pilot controlling the unmanned aerial vehicle at each point along the linear path is in visual contact range with the unmanned aerial vehicle;
• and
• during the flying of the linear path, determining the quality of the at least one mobile communications network at the given position in the air corridor.