An assembly configured for connection to a single unmanned aerial vehicle, UAV , the assembly comprising: a plurality of emulator devices each configured for attachment to the single UAV, each respective emulator device comprising a first emulation component , the first emulation component configured to provide, to a target detection system, a first characteristic associated with a respective type of airborne object; and a plurality of respective first connection tethers each configured to operably couple a respective one of the plurality of emulator devices to the single UAV at a respective spacing from the single UAV, each respective first connection tether formed such that at least a portion of each respective connection tether comprises a respective material that is configured so that it does not substantially reflect RF energy; wherein each of the plurality of respective first connection tethers associated with the plurality of respective emulator devices is constructed and arranged so that each of the plurality of respective emulator devices maintains at least the respective spacing from the single UAV when the single UAV is in flight, and wherein at least one of the plurality of first connection tethers is configured to be dynamically adjustable so as to vary the respective spacing between the single UAV and the respective emulator device to which the at least one first connection tether is connected; wherein the assembly, when connected to the single UAV, is configured so that each respective emulator device emulates the first characteristic to the target detection system, such that, during flight of the single UAV, the assembly presents, to the target detection system, characteristics emulating a plurality of airborne objects; and wherein the dynamic adjustment of the respective spacing between the single UAV and the respective emulator device is configured to modify the first characteristic associated with the respective type of airborne object. a plurality of emulator devices each configured for attachment to the single UAV, each respective emulator device comprising a first emulation component , the first emulation component configured to provide, to a target detection system, a first characteristic associated with a respective type of airborne object; and a plurality of respective first connection tethers each configured to operably couple a respective one of the plurality of emulator devices to the single UAV at a respective spacing from the single UAV, each respective first connection tether formed such that at least a portion of each respective connection tether comprises a respective material that is configured so that it does not substantially reflect RF energy; wherein each of the plurality of respective first connection tethers associated with the plurality of respective emulator devices is constructed and arranged so that each of the plurality of respective emulator devices maintains at least the respective spacing from the single UAV when the single UAV is in flight, and wherein at least one of the plurality of first connection tethers is configured to be dynamically adjustable so as to vary the respective spacing between the single UAV and the respective emulator device to which the at least one first connection tether is connected; wherein the assembly, when connected to the single UAV, is configured so that each respective emulator device emulates the first characteristic to the target detection system, such that, during flight of the single UAV, the assembly presents, to the target detection system, characteristics emulating a plurality of airborne objects; and wherein the dynamic adjustment of the respective spacing between the single UAV and the respective emulator device is configured to modify the first characteristic associated with the respective type of airborne object. <EOS>