| CPC G01S 13/06 (2013.01) [F41H 11/02 (2013.01); F41H 13/0075 (2013.01); G01S 3/782 (2013.01); G01S 7/021 (2013.01); G01S 7/38 (2013.01); G01S 7/414 (2013.01); G01S 13/42 (2013.01); G01S 13/86 (2013.01); G01S 13/88 (2013.01); G05D 1/0022 (2013.01); G08G 5/22 (2025.01); G08G 5/26 (2025.01); G08G 5/55 (2025.01); G08G 5/59 (2025.01); B64U 2101/30 (2023.01); B64U 2201/10 (2023.01); G01S 13/883 (2013.01); G01S 13/933 (2020.01)] | 22 Claims |

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1. A system, comprising:
plural ground-based sensors configured to determine location and at least one characteristic of an unmanned aerial system (UAS) in flight, the ground-based sensors comprising (a) at least a radar and (b) an image sensor comprising at least one electro optical sensor and/or at least one infrared sensor; and
at least one ground-based computer processor connected to the ground-based sensors and programmed to perform operations comprising:
in response to data from the plural ground-based sensors, determining whether the UAS in flight is a threat that is in a vicinity of a property, place, event or person or is approaching the vicinity of the property, place, event or person, and
conditioned on determining the UAS in flight is a threat in or approaching the vicinity of a property, place, event or person, countering the UAS in flight by dispatching a counterdrone unmanned aerial system (UAS) having electronics, a motor and a navigation system, with autonomous navigation data supplied by the system, to counter the UAS in flight,
wherein the counterdrone UAS weighs less than 55 pounds.
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