CPC G05D 1/0011 (2013.01) [B64C 1/36 (2013.01); B64C 39/024 (2013.01); B64F 1/36 (2013.01); G05D 1/0276 (2013.01); B64U 10/13 (2023.01); B64U 2201/104 (2023.01)] | 18 Claims |
1. An unmanned aerial vehicle (UAV) navigation system comprising:
a portable, ground-based landing pad comprising:
a first antenna; and
first processing circuitry configured to cause the first antenna to transmit a data packet in response to determining that the UAV has lost a data communication with a controller, wherein the data communication comprises at least one of telemetry data, a navigation signal, a control signal, or a GPS signal, wherein the data packet comprises a time stamp and an identification number for the landing pad;
a UAV comprising:
a second antenna configured to receive the data packet; and
second processing circuitry configured to:
determine a signal strength between the first antenna and the second antenna;
determine, based on the signal strength, an orientation of the UAV relative to the landing pad; and
determine, based on a time of flight of the data packet, a distance between the UAV and the landing pad.
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