An airborne system for the measurement and characterization of antennas or electromagnetic wave radiating systems, comprising: - an aerial module configured to travel from point to point of a measurement path, comprises a receiving antenna, electromagnetic emission measurement unit, a positioning and guidance system of the aerial module and an aerial control unit, the receiving antenna is configured to capture an electromagnetic field radiated by one or more antennas or radiating systems and the receiving antenna is connected to the electromagnetic emission measurement unit, and the aerial control unit is configured to collect information from the electromagnetic emission measuring unit and the positioning and guidance system, the aerial control unit is configured to control the flight parameters of the aerial module and to exchange information with a ground-based station; - the ground-based station comprises a flight control system for the aerial module, a processing unit for the electromagnetic emission measurements received by the electromagnetic emission measurement unit is configured to process the measurements of the electromagnetic field radiated by the antenna or radiating system using a set of electromagnetic emission measurement processing algorithms, and a computer application; and - a means of communication configured to transmit and receive wireless signals between the aerial module and the ground-based station, characterized in that the receiving antenna is directed towards the antenna or radiating system; in that the electromagnetic emission measurement unit is configured to directly or indirectly provide information on the amplitude and/or phase of the electromagnetic field radiated by the antenna or radiating system along the measurement path; in that the positioning and guidance system of the aerial module comprises a global positioning system, a positioning system based on inertial sensors, a positioning system based on real-time satellite kinetic navigation which is configured to exchange information with a real-time satellite kinetic navigation base station located at the ground-based station, and a positioning system based on photogrammetry which is configured to send information to the aerial control unit, providing the precise three-dimensional location of the aerial module and the georeferencing of the measurements of the electromagnetic field radiated by the antenna or radiating system with an accuracy equal to or less than three centimetres; in that the amplitude and/or phase of the electromagnetic field radiated by the antenna or radiating system is processed by the electromagnetic emission measurement processing unit, thereby characterising the antenna or radiating system; in that a set of algorithms for the processing of the electromagnetic emission measurements from the electromagnetic emission measurement processing unit is a near field - near field transformation algorithm for the obtaining of the distribution of the electromagnetic field at the aperture of the antenna, a near field - far field transformation algorithm for the obtaining of the antenna radiation pattern and an algorithm for determining the electromagnetic protection volume of the antenna or radiating system; in that the computer application is configured to provide the radiation pattern, the radiation source diagram and/or the electromagnetic protection volume of the antenna or radiating system; and in that the means of communication to transmit and receive wireless signals between the aerial module and the ground-based station is configured to use a frequency band selected from at least two different frequency bands in order to avoid overlap with the frequency of the electromagnetic field radiated by the antenna or radiating system. - an aerial module configured to travel from point to point of a measurement path, comprises a receiving antenna, electromagnetic emission measurement unit, a positioning and guidance system of the aerial module and an aerial control unit, the receiving antenna is configured to capture an electromagnetic field radiated by one or more antennas or radiating systems and the receiving antenna is connected to the electromagnetic emission measurement unit, and the aerial control unit is configured to collect information from the electromagnetic emission measuring unit and the positioning and guidance system, the aerial control unit is configured to control the flight parameters of the aerial module and to exchange information with a ground-based station; - the ground-based station comprises a flight control system for the aerial module, a processing unit for the electromagnetic emission measurements received by the electromagnetic emission measurement unit is configured to process the measurements of the electromagnetic field radiated by the antenna or radiating system using a set of electromagnetic emission measurement processing algorithms, and a computer application; and - a means of communication configured to transmit and receive wireless signals between the aerial module and the ground-based station,