Blimp-based aerial UAV defense system

A blimp-based aerial UAV defense system, comprising:

• a plurality of airborne defense agents (ADAs), wherein each ADA includes a blimp located at a fixed radius from a protected site and equidistant from each other ADA, wherein each ADA equipped with:
• a directional microphone array configured to detect acoustic signals emitted by a UAV;
• a first computing device including a first computer-readable medium comprising first program instructions, executable by first processing circuitry, to cause the first processing circuitry to determine a direction and a distance of each approaching UAV of a plurality of unmanned aerial vehicles (UAV) from the ADA;
• a GPS receiver configured to locate the ADA in three-dimensional space;
• a transceiver;
• a base station configured with a wideband communications link to communicate with the transceiver of each ADA and the protected site;
• a control center (BS-CC) located within the base station and configured with a second computing device including a second computer-readable medium comprising program instructions, executable by second processing circuitry, to cause the second processing circuitry to aggregate the directions and distances of the approaching UAVs to predict routes towards the protected site and to alert the protected site of the predicted route of each approaching UAV,
• a plurality of fixed towers of height H, each tower located at a fixed radius from the protected site and equidistant from each other tower;
• a plurality of tethers, each tether of length L, wherein a top portion of each fixed tower is connected to one of the tethers of the plurality of tethers;
• each blimp having a lower mount attached to one tether of the plurality of tethers;
• and
• wherein each blimp has a motor, a propeller, and navigation circuitry configured to hold the first computing device and the directional microphone array of the ADA at a fixed height L+H above the ground and to hover the blimp at a steady position.