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Powered by the advances in microelectronics technologies, unmanned aerialvehicles (UAVs) provide a vast variety of services ranging from surveillance todelivery in both military and civilian domains. It is clear that a successfuloperation in those services relies heavily on wireless communicationtechnologies. Even though wireless communication techniques could be consideredto reach a certain level of maturity, wireless communication links includingUAVs should be regarded in a different way due to the peculiar characteristicsof UAVs such as agility in 3D spatial domain and versatility in modes ofoperation. Such mobility characteristics in a vast variety of environmentaldiversity render links including UAVs different from those in traditional,terrestrial mobility scenarios. Furthermore, UAVs are critical instruments fornetwork operators in order to provide basic voice and short messaging servicesfor narrow band communication in and around disaster areas. It is obvious thatsuch widespread use of UAVs under different scenarios and environments requiresa better understanding the behavior of the communication links that includeUAVs. Therefore, in this study, details of a measurement campaign designed tocollect data for large-scale propagation characterization of air-to-groundlinks operated by UAVs at 446MHz under narrowband assumption are given. Datacollection, post-processing, and measurement results are provided.

Measurement Based Statistical Channel Characterization of Air-to-Ground Path Loss Model at 446 MHz for Narrow-Band Signals in Low Altitude UAVs